feat: Update package.json to 2.1.2

chore: fix checkout version on unity

.github/workflows/build-debug.yml

@@ -3,16 +3,16 @@ name: Build-Debug
 on:
   push:
     branches:
-      - "**"
+      - "master"
     tags:
       - "!*" # not a tag push
   pull_request:
-    types:
-      - opened
-      - synchronize
+    branches:
+      - "master"
 
 jobs:
   build-dotnet:
+    if: "!(contains(github.event.head_commit.message, '[skip ci]') || contains(github.event.head_commit.message, '[ci skip]'))"
     runs-on: ubuntu-latest
     env:
       DOTNET_CLI_TELEMETRY_OPTOUT: 1
@@ -22,53 +22,65 @@ jobs:
       - uses: actions/checkout@v2
       - uses: actions/setup-dotnet@v1
         with:
-          dotnet-version: 3.1.101
+          dotnet-version: 3.1.x
       - run: dotnet test -c Debug ./src/UniTask.NetCoreTests/UniTask.NetCoreTests.csproj
 
   build-unity:
-    if: "(github.event == 'push' && github.repository_owner == 'Cysharp') || startsWith(github.event.pull_request.head.label, 'Cysharp:')"
+    if: "!(contains(github.event.head_commit.message, '[skip ci]') || contains(github.event.head_commit.message, '[ci skip]')) && ((github.event_name == 'push' && github.repository_owner == 'Cysharp') || startsWith(github.event.pull_request.head.label, 'Cysharp:'))"
     strategy:
       matrix:
-        unity: ["2019.3.9f1", "2020.1.0b5"]
+        unity: ["2019.3.9f1", "2019.4.13f1", "2020.1.12f1"]
         include:
           - unity: 2019.3.9f1
-            license: UNITY_2019_3
-          - unity: 2020.1.0b5
-            license: UNITY_2020_1
+            license: UNITY_LICENSE_2019
+          - unity: 2019.4.13f1
+            license: UNITY_LICENSE_2019
+          - unity: 2020.1.12f1
+            license: UNITY_LICENSE_2020
     runs-on: ubuntu-latest
-    container:
-      # with linux-il2cpp. image from https://hub.docker.com/r/gableroux/unity3d/tags
-      image: gableroux/unity3d:${{ matrix.unity }}-linux-il2cpp
     steps:
-      - run: apt update && apt install git -y
       - uses: actions/checkout@v2
-      # create unity activation file and store to artifacts.
-      - run: /opt/Unity/Editor/Unity -quit -batchmode -nographics -logFile -createManualActivationFile || exit 0
-      - uses: actions/upload-artifact@v1
-        with:
-          name: Unity_v${{ matrix.unity }}.alf
-          path: ./Unity_v${{ matrix.unity }}.alf
-      # activate Unity from manual license file(ulf)
-      - run: echo -n "$UNITY_LICENSE" >> .Unity.ulf
+      # Execute scripts: RuntimeUnitTestToolkit
+      # /opt/Unity/Editor/Unity -quit -batchmode -nographics -silent-crashes -logFile -projectPath . -executeMethod UnitTestBuilder.BuildUnitTest /headless /ScriptBackend mono /BuildTarget StandaloneLinux64
+      - name: Build UnitTest(Linux64, mono)
+        uses: game-ci/unity-builder@v2.0-alpha-6
         env:
           UNITY_LICENSE: ${{ secrets[matrix.license] }}
-      - name: Activate Unity, always returns a success. But if a subsequent run fails, the activation may have failed(if succeeded, shows `Next license update check is after` and not shows other message(like GUID != GUID). If fails not). In that case, upload the artifact's .alf file to https://license.unity3d.com/manual to get the .ulf file and set it to secrets.
-        run: /opt/Unity/Editor/Unity -quit -batchmode -nographics -silent-crashes -logFile -manualLicenseFile .Unity.ulf || exit 0
-
-      # Execute scripts: RuntimeUnitTestToolkit
-      - name: Build UnitTest(Linux64, mono)
-        run: /opt/Unity/Editor/Unity -quit -batchmode -nographics -silent-crashes -logFile -projectPath . -executeMethod UnitTestBuilder.BuildUnitTest /headless /ScriptBackend mono /BuildTarget StandaloneLinux64
-        working-directory: src/UniTask
+        with:
+          projectPath: src/UniTask
+          unityVersion: ${{ matrix.unity }}
+          targetPlatform: StandaloneLinux64
+          buildMethod: UnitTestBuilder.BuildUnitTest
+          customParameters: /headless /ScriptBackend mono
+          versioning: None
       - name: Execute UnitTest
         run: ./src/UniTask/bin/UnitTest/StandaloneLinux64_Mono2x/test
 
       # Execute scripts: Export Package
+      #  /opt/Unity/Editor/Unity -quit -batchmode -nographics -silent-crashes -logFile -projectPath . -executeMethod PackageExporter.Export
       - name: Export unitypackage
-        run: /opt/Unity/Editor/Unity -quit -batchmode -nographics -silent-crashes -logFile -projectPath . -executeMethod PackageExporter.Export
+        uses: game-ci/unity-builder@v2.0-alpha-6
+        env:
+          UNITY_LICENSE: ${{ secrets[matrix.license] }}
+        with:
+          projectPath: src/UniTask
+          unityVersion: ${{ matrix.unity }}
+          targetPlatform: StandaloneLinux64
+          buildMethod: PackageExporter.Export
+          versioning: None
+
+      - name: check all .meta is commited
+        run: |
+          if git ls-files --others --exclude-standard -t | grep --regexp='[.]meta$'; then
+            echo "Detected .meta file generated. Do you forgot commit a .meta file?"
+            exit 1
+          else
+            echo "Great, all .meta files are commited."
+          fi
         working-directory: src/UniTask
 
       # Store artifacts.
       - uses: actions/upload-artifact@v2
         with:
-          name: UniTask.unitypackage.zip
+          name: UniTask.unitypackage-${{ matrix.unity }}.zip
           path: ./src/UniTask/*.unitypackage

.github/workflows/build-release.yml

@@ -1,105 +1,181 @@
-name: Build-Release
+name: build-release
 
 on:
-  push:
-    tags:
-      - "[0-9]+.[0-9]+.[0-9]+*"
+  workflow_dispatch:
+    inputs:
+      tag:
+        description: "tag: git tag you want create. (sample 1.0.0)"
+        required: true
+      dry_run:
+        description: "dry_run: true will never create relase/nuget."
+        required: true
+        default: "false"
+
+env:
+  GIT_TAG: ${{ github.event.inputs.tag }}
+  DRY_RUN: ${{ github.event.inputs.dry_run }}
+  DRY_RUN_BRANCH_PREFIX: "test_release"
+  DOTNET_SDK_VERISON_3: 3.1.x
 
 jobs:
-  build-dotnet:
+  update-packagejson:
     runs-on: ubuntu-latest
+    env:
+      TARGET_FILE: ./src/UniTask/Assets/Plugins/UniTask/package.json
+    outputs:
+      sha: ${{ steps.commit.outputs.sha }}
+    steps:
+      - uses: actions/checkout@v2
+      - name: before
+        run: cat ${{ env.TARGET_FILE}}
+      - name: update package.json to version ${{ env.GIT_TAG }}
+        run: sed -i -e "s/\(\"version\":\) \"\(.*\)\",/\1 \"${{ env.GIT_TAG }}\",/" ${{ env.TARGET_FILE }}
+      - name: after
+        run: cat ${{ env.TARGET_FILE}}
+      - name: Commit files
+        id: commit
+        run: |
+          git config --local user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git config --local user.name "github-actions[bot]"
+          git commit -m "feat: Update package.json to ${{ env.GIT_TAG }}" -a
+          echo "::set-output name=sha::$(git rev-parse HEAD)"
+      - name: check sha
+        run: echo "SHA ${SHA}"
+        env:
+          SHA: ${{ steps.commit.outputs.sha }}
+      - name: tag
+        run: git tag ${{ env.GIT_TAG }}
+        if: env.DRY_RUN == 'false'
+      - name: Push changes
+        uses: ad-m/github-push-action@master
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          branch: ${{ github.ref }}
+          tags: true
+        if: env.DRY_RUN == 'false'
+      - name: Push changes (dry_run)
+        uses: ad-m/github-push-action@master
+        with:
+          github_token: ${{ secrets.GITHUB_TOKEN }}
+          branch: ${{ env.DRY_RUN_BRANCH_PREFIX }}-${{ env.GIT_TAG }}
+          tags: false
+        if: env.DRY_RUN == 'true'
+
+  build-dotnet:
+    needs: [update-packagejson]
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
     env:
       DOTNET_CLI_TELEMETRY_OPTOUT: 1
       DOTNET_SKIP_FIRST_TIME_EXPERIENCE: 1
       NUGET_XMLDOC_MODE: skip
     steps:
+      - run: echo ${{ needs.update-packagejson.outputs.sha }}
       - uses: actions/checkout@v2
+        with:
+          ref: ${{ needs.update-packagejson.outputs.sha }}
       - uses: actions/setup-dotnet@v1
         with:
-          dotnet-version: 3.1.101
-      # set release tag(*.*.*) to env.GIT_TAG
-      - run: echo ::set-env name=GIT_TAG::${GITHUB_REF#refs/tags/}
-
+          dotnet-version: "${{ env.DOTNET_SDK_VERSION_3 }}"
       # build and pack
       - run: dotnet build -c Release -p:Version=${{ env.GIT_TAG }}
       - run: dotnet test -c Release --no-build
-      - run: dotnet pack ./src/UniTask.NetCore/UniTask.NetCore.csproj -c Release --no-build -p:Version=${{ env.GIT_TAG }}
-
+      - run: dotnet pack ./src/UniTask.NetCore/UniTask.NetCore.csproj -c Release --no-build -p:Version=${{ env.GIT_TAG }} -o ./publish
       # Store artifacts.
       - uses: actions/upload-artifact@v1
         with:
           name: nuget
-          path: ./src/UniTask.NetCore/bin/Release/UniTask.${{ env.GIT_TAG }}.nupkg
+          path: ./publish/
 
   build-unity:
+    needs: [update-packagejson]
     strategy:
       matrix:
-        unity: ['2019.3.9f1']
+        unity: ["2019.3.9f1"]
         include:
           - unity: 2019.3.9f1
-            license: UNITY_2019_3
+            license: UNITY_LICENSE_2019
     runs-on: ubuntu-latest
-    container:
-      # with linux-il2cpp. image from https://hub.docker.com/r/gableroux/unity3d/tags
-      image: gableroux/unity3d:${{ matrix.unity }}-linux-il2cpp
+    timeout-minutes: 15
     steps:
-      - run: apt update && apt install git -y
+      - run: echo ${{ needs.update-packagejson.outputs.sha }}
       - uses: actions/checkout@v2
-      - run: echo -n "$UNITY_LICENSE" >> .Unity.ulf
+        with:
+          ref: ${{ needs.update-packagejson.outputs.sha }}
+      # Execute scripts: Export Package
+      # /opt/Unity/Editor/Unity -quit -batchmode -nographics -silent-crashes -logFile -projectPath . -executeMethod PackageExporter.Export
+      - name: Export unitypackage
+        uses: game-ci/unity-builder@v2.0-alpha-6
         env:
           UNITY_LICENSE: ${{ secrets[matrix.license] }}
-      - run: /opt/Unity/Editor/Unity -quit -batchmode -nographics -silent-crashes -logFile -manualLicenseFile .Unity.ulf || exit 0
+        with:
+          projectPath: src/UniTask
+          unityVersion: ${{ matrix.unity }}
+          targetPlatform: StandaloneLinux64
+          buildMethod: PackageExporter.Export
+          versioning: None
 
-      # set release tag(*.*.*) to env.GIT_TAG
-      - run: echo ::set-env name=GIT_TAG::${GITHUB_REF#refs/tags/}
-
-      # Execute scripts: Export Package
-      - name: Export unitypackage
-        run: /opt/Unity/Editor/Unity -quit -batchmode -nographics -silent-crashes -logFile -projectPath . -executeMethod PackageExporter.Export
+      - name: check all .meta is commited
+        run: |
+          if git ls-files --others --exclude-standard -t | grep --regexp='[.]meta$'; then
+            echo "Detected .meta file generated. Do you forgot commit a .meta file?"
+            exit 1
+          else
+            echo "Great, all .meta files are commited."
+          fi
         working-directory: src/UniTask
 
-      # Store artifacts.      
+      # Store artifacts.
       - uses: actions/upload-artifact@v2
         with:
           name: UniTask.${{ env.GIT_TAG }}.unitypackage
           path: ./src/UniTask/UniTask.${{ env.GIT_TAG }}.unitypackage
 
   create-release:
-    needs: [build-dotnet, build-unity]
+    if: github.event.inputs.dry_run == 'false'
+    needs: [update-packagejson, build-dotnet, build-unity]
     runs-on: ubuntu-latest
     env:
       DOTNET_CLI_TELEMETRY_OPTOUT: 1
       DOTNET_SKIP_FIRST_TIME_EXPERIENCE: 1
       NUGET_XMLDOC_MODE: skip
     steps:
-    # setup dotnet for nuget push
-    - uses: actions/setup-dotnet@v1
-      with:
-        dotnet-version: 3.1.101
-    # set release tag(*.*.*) to env.GIT_TAG
-    - run: echo ::set-env name=GIT_TAG::${GITHUB_REF#refs/tags/}
+      # setup dotnet for nuget push
+      - uses: actions/setup-dotnet@v1
+        with:
+          dotnet-version: "${{ env.DOTNET_SDK_VERSION_3 }}"
+      # Create Releases
+      - uses: actions/create-release@v1
+        id: create_release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ env.GIT_TAG }}
+          release_name: Ver.${{ env.GIT_TAG }}
+          commitish: ${{ needs.update-packagejson.outputs.sha }}
+          draft: true
+          prerelease: false
+      # Download(All) Artifacts to current directory
+      - uses: actions/download-artifact@v2
+      # Upload to NuGet
+      - run: dotnet nuget push "./nuget/*.nupkg" --skip-duplicate -s https://www.nuget.org/api/v2/package -k ${{ secrets.NUGET_KEY }}
+      # Upload to Releases(unitypackage)
+      - uses: actions/upload-release-asset@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          upload_url: ${{ steps.create_release.outputs.upload_url }}
+          asset_path: ./UniTask.${{ env.GIT_TAG }}.unitypackage/UniTask.${{ env.GIT_TAG }}.unitypackage
+          asset_name: UniTask.${{ env.GIT_TAG }}.unitypackage
+          asset_content_type: application/octet-stream
 
-    # Create Releases
-    - uses: actions/create-release@v1
-      id: create_release
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      with:
-        tag_name: ${{ github.ref }}
-        release_name: Ver.${{ github.ref }}
-
-    # Download(All) Artifacts to current directory
-    - uses: actions/download-artifact@v2-preview
-
-    # Upload to NuGet
-    - run: dotnet nuget push "./nuget/*.nupkg" -s https://www.nuget.org/api/v2/package -k ${{ secrets.NUGET_KEY }}
-
-    # Upload to Releases(unitypackage)
-    - uses: actions/upload-release-asset@v1
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      with:
-        upload_url: ${{ steps.create_release.outputs.upload_url }}
-        asset_path: ./UniTask.${{ env.GIT_TAG }}.unitypackage/UniTask.${{ env.GIT_TAG }}.unitypackage
-        asset_name: UniTask.${{ env.GIT_TAG }}.unitypackage
-        asset_content_type: application/octet-stream
+  cleanup:
+    if: github.event.inputs.dry_run == 'true'
+    needs: [build-dotnet, build-unity]
+    runs-on: ubuntu-latest
+    steps:
+      - name: Delete branch
+        uses: dawidd6/action-delete-branch@v3
+        with:
+          github_token: ${{ github.token }}
+          branches: ${{ env.DRY_RUN_BRANCH_PREFIX }}-${{ env.GIT_TAG }}

.github/workflows/stale.yml

@@ -0,0 +1,24 @@
+name: "Close stale issues"
+
+on:
+  schedule:
+    - cron: "0 0 * * *"
+
+jobs:
+  stale:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/stale@v3
+        with:
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          # enable issue
+          stale-issue-message: "This issue is stale because it has been open 90 days with no activity. Remove stale label or comment or this will be closed in 7 days."
+          stale-issue-label: "stale"
+          # enable pr
+          stale-pr-message: "This PR is stale because it has been open 90 days with no activity. Remove stale label or comment or this will be closed in 7 days."
+          stale-pr-label: "stale"
+          days-before-stale: 90
+          days-before-close: 7
+          exempt-issue-labels: "wip"
+          exempt-pr-labels: "wip"
+          remove-stale-when-updated: true

.gitignore

@@ -213,3 +213,51 @@ src/UniTask/UniTask.Addressables.csproj
 src/UniTask/UniTask.DOTween.csproj
 
 src/UniTask/UniTask.TextMeshPro.csproj
+
+src/UniTask/RuntimeUnitTestToolkit.Player.csproj
+
+src/UniTask/TempAsm.Player.csproj
+
+src/UniTask/UniTask.Addressables.Player.csproj
+
+src/UniTask/UniTask.DOTween.Player.csproj
+
+src/UniTask/UniTask.Linq.Player.csproj
+
+src/UniTask/UniTask.Player.csproj
+
+src/UniTask/UniTask.Tests.Player.csproj
+
+src/UniTask/UniTask.TextMeshPro.Player.csproj
+
+src/UniTask/Unity.Addressables.Player.csproj
+
+src/UniTask/Unity.Analytics.DataPrivacy.Player.csproj
+
+src/UniTask/Unity.ResourceManager.Player.csproj
+
+src/UniTask/Unity.ScriptableBuildPipeline.Player.csproj
+
+src/UniTask/Unity.TextMeshPro.Player.csproj
+
+src/UniTask/Unity.Timeline.Player.csproj
+
+src/UniTask/UnityEngine.Advertisements.Player.csproj
+
+src/UniTask/UnityEngine.Monetization.Player.csproj
+
+src/UniTask/UnityEngine.TestRunner.Player.csproj
+
+src/UniTask/UnityEngine.UI.Player.csproj
+
+src/UniTask/DOTween.Modules.Player.csproj
+
+src/UniTask/Assembly-CSharp.Player.csproj
+
+src/UniTask/Unity.EditorCoroutines.Editor.csproj
+
+src/UniTask/.vsconfig
+
+src/UniTask/Logs/ApiUpdaterCheck.txt
+
+src/UniTask/Assembly-CSharp-firstpass.csproj

README.md

@@ -2,19 +2,20 @@ UniTask
 ===
 [![GitHub Actions](https://github.com/Cysharp/UniTask/workflows/Build-Debug/badge.svg)](https://github.com/Cysharp/UniTask/actions) [![Releases](https://img.shields.io/github/release/Cysharp/UniTask.svg)](https://github.com/Cysharp/UniTask/releases)
 
-Provides an efficient allocation free async/await integration to Unity.
+Provides an efficient allocation free async/await integration for Unity.
 
-* Struct based `UniTask<T>` and custom AsyncMethodBuilder to achive zero allocation
-* All Unity AsyncOperations and Coroutine to awaitable
-* PlayerLoop based task(`UniTask.Yield`, `UniTask.Delay`, `UniTask.DelayFrame`, etc..) that enable to replace all coroutine operation
+* Struct based `UniTask<T>` and custom AsyncMethodBuilder to achieve zero allocation
+* Makes all Unity AsyncOperations and Coroutines awaitable
+* PlayerLoop based task(`UniTask.Yield`, `UniTask.Delay`, `UniTask.DelayFrame`, etc..) that enable replacing all coroutine operations
 * MonoBehaviour Message Events and uGUI Events as awaitable/async-enumerable
-* Completely run on Unity's PlayerLoop so don't use thread and run on WebGL, wasm, etc.
+* Runs completely on Unity's PlayerLoop so doesn't use threads and runs on WebGL, wasm, etc.
 * Asynchronous LINQ, with Channel and AsyncReactiveProperty
-* TaskTracker window to prevent memory leak
+* TaskTracker window to prevent memory leaks
 * Highly compatible behaviour with Task/ValueTask/IValueTaskSource
 
-Techinical details, see blog post: [UniTask v2 — Zero Allocation async/await for Unity, with Asynchronous LINQ
-](https://medium.com/@neuecc/unitask-v2-zero-allocation-async-await-for-unity-with-asynchronous-linq-1aa9c96aa7dd)
+For technical details, see blog post: [UniTask v2 — Zero Allocation async/await for Unity, with Asynchronous LINQ
+](https://medium.com/@neuecc/unitask-v2-zero-allocation-async-await-for-unity-with-asynchronous-linq-1aa9c96aa7dd)  
+For advanced tips, see blog post: [Extends UnityWebRequest via async decorator pattern — Advanced Techniques of UniTask](https://medium.com/@neuecc/extends-unitywebrequest-via-async-decorator-pattern-advanced-techniques-of-unitask-ceff9c5ee846)
 
 <!-- START doctoc generated TOC please keep comment here to allow auto update -->
 <!-- DON'T EDIT THIS SECTION, INSTEAD RE-RUN doctoc TO UPDATE -->
@@ -32,8 +33,13 @@ Techinical details, see blog post: [UniTask v2 — Zero Allocation async/await f
 - [Awaitable Events](#awaitable-events)
 - [Channel](#channel)
 - [For Unit Testing](#for-unit-testing)
+- [ThreadPool limitation](#threadpool-limitation)
+- [IEnumerator.ToUniTask limitation](#ienumeratortounitask-limitation)
+- [For UnityEditor](#for-unityeditor)
 - [Compare with Standard Task API](#compare-with-standard-task-api)
 - [Pooling Configuration](#pooling-configuration)
+- [Allocation on Profiler](#allocation-on-profiler)
+- [UniTaskSynchronizationContext](#unitasksynchronizationcontext)
 - [API References](#api-references)
 - [UPM Package](#upm-package)
   - [Install via git URL](#install-via-git-url)
@@ -66,7 +72,7 @@ async UniTask<string> DemoAsync()
     // .ToUniTask accepts progress callback(and all options), Progress.Create is a lightweight alternative of IProgress<T>
     var asset3 = await Resources.LoadAsync<TextAsset>("baz").ToUniTask(Progress.Create<float>(x => Debug.Log(x)));
 
-    // await frame-based operation like coroutine
+    // await frame-based operation like a coroutine
     await UniTask.DelayFrame(100); 
 
     // replacement of yield return new WaitForSeconds/WaitForSecondsRealtime
@@ -91,10 +97,10 @@ async UniTask<string> DemoAsync()
     // special helper of WaitUntil
     await UniTask.WaitUntilValueChanged(this, x => x.isActive);
 
-    // You can await IEnumerator coroutine
+    // You can await IEnumerator coroutines
     await FooCoroutineEnumerator();
 
-    // You can await standard task
+    // You can await a standard task
     await Task.Run(() => 100);
 
     // Multithreading, run on ThreadPool under this code
@@ -116,13 +122,13 @@ async UniTask<string> DemoAsync()
     var task2 = GetTextAsync(UnityWebRequest.Get("http://bing.com"));
     var task3 = GetTextAsync(UnityWebRequest.Get("http://yahoo.com"));
 
-    // concurrent async-wait and get result easily by tuple syntax
+    // concurrent async-wait and get results easily by tuple syntax
     var (google, bing, yahoo) = await UniTask.WhenAll(task1, task2, task3);
 
     // shorthand of WhenAll, tuple can await directly
     var (google2, bing2, yahoo2) = await (task1, task2, task3);
     
-    // You can handle timeout easily
+    // You can handle timeouts easily
     await GetTextAsync(UnityWebRequest.Get("http://unity.com")).Timeout(TimeSpan.FromMilliseconds(300));
 
     // return async-value.(or you can use `UniTask`(no result), `UniTaskVoid`(fire and forget)).
@@ -132,9 +138,9 @@ async UniTask<string> DemoAsync()
 
 Basics of UniTask and AsyncOperation
 ---
-UniTask feature rely on C# 7.0([task-like custom async method builder feature](https://github.com/dotnet/roslyn/blob/master/docs/features/task-types.md)) so required Unity version is after `Unity 2018.3`, officialy lower support version is `Unity 2018.4.13f1`.
+UniTask features rely on C# 7.0([task-like custom async method builder feature](https://github.com/dotnet/roslyn/blob/master/docs/features/task-types.md)) so the required Unity version is after `Unity 2018.3`, the official lowest version supported is `Unity 2018.4.13f1`.
 
-Why UniTask(custom task-like object) is required? Because Task is too heavy, not matched to Unity threading(single-thread). UniTask does not use thread and SynchronizationContext/ExecutionContext because almost Unity's asynchronous object is automaticaly dispatched by Unity's engine layer. It acquires more fast and more less allocation, completely integrated with Unity.
+Why is UniTask(custom task-like object) required? Because Task is too heavy and not matched to Unity threading (single-thread). UniTask does not use threads and SynchronizationContext/ExecutionContext because Unity's asynchronous object is automaticaly dispatched by Unity's engine layer. It achieves faster and lower allocation, and is completely integrated with Unity.
 
 You can await `AsyncOperation`, `ResourceRequest`, `AssetBundleRequest`, `AssetBundleCreateRequest`, `UnityWebRequestAsyncOperation`, `AsyncGPUReadbackRequest`, `IEnumerator` and others when `using Cysharp.Threading.Tasks;`.
 
@@ -146,33 +152,32 @@ UniTask provides three pattern of extension methods.
 * .ToUniTask(IProgress, PlayerLoopTiming, CancellationToken);
 ```
 
-`WithCancellation` is a simple version of `ToUniTask`, both returns `UniTask`. Details of cancellation, see: [Cancellation and Exception handling](#cancellation-and-exception-handling) section.
+`WithCancellation` is a simple version of `ToUniTask`, both return `UniTask`. For details of cancellation, see: [Cancellation and Exception handling](#cancellation-and-exception-handling) section.
 
-> Note: WithCancellation is returned from native timing of PlayerLoop but ToUniTask is returned from specified PlayerLoopTiming. Details of timing, see: [PlayerLoop](#playerloop) section.
+> Note: WithCancellation is returned from native timing of PlayerLoop but ToUniTask is returned from specified PlayerLoopTiming. For details of timing, see: [PlayerLoop](#playerloop) section.
 
-The type of `UniTask` can use utility like `UniTask.WhenAll`, `UniTask.WhenAny`. It is like Task.WhenAll/WhenAny but return type is more useful, returns value tuple so can deconsrtuct each result and pass multiple type.
+> Note: AssetBundleRequest has `asset` and `allAssets`, default await returns `asset`. If you want to get `allAssets`, you can use `AwaitForAllAssets()` method.
+
+The type of `UniTask` can use utilities like `UniTask.WhenAll`, `UniTask.WhenAny`. They are like `Task.WhenAll`/`Task.WhenAny` but the return type is more useful. They return value tuples so you can deconstruct each result and pass multiple types.
 
 ```csharp
-public class SceneAssets
+public async UniTaskVoid LoadManyAsync()
 {
-    public SceneAssets()
-    {
-        // parallel load.
-        var (a, b, c) = await UniTask.WhenAll(
-            LoadAsSprite("foo"),
-            LoadAsSprite("bar"),
-            LoadAsSprite("baz"));
-    }
+    // parallel load.
+    var (a, b, c) = await UniTask.WhenAll(
+        LoadAsSprite("foo"),
+        LoadAsSprite("bar"),
+        LoadAsSprite("baz"));
+}
 
-    async UniTask<Sprite> LoadAsSprite(string path)
-    {
-        var resource = await Resources.LoadAsync<Sprite>(path);
-        return (resource as Sprite);
-    }
+async UniTask<Sprite> LoadAsSprite(string path)
+{
+    var resource = await Resources.LoadAsync<Sprite>(path);
+    return (resource as Sprite);
 }
 ```
 
-If you want to convert callback to UniTask, you can use `UniTaskCompletionSource<T>` that is the lightweight edition of `TaskCompletionSource<T>`. 
+If you want to convert a callback to UniTask, you can use `UniTaskCompletionSource<T>` which is a lightweight edition of `TaskCompletionSource<T>`. 
 
 ```csharp
 public UniTask<int> WrapByUniTaskCompletionSource()
@@ -189,7 +194,7 @@ public UniTask<int> WrapByUniTaskCompletionSource()
 
 You can convert Task -> UniTask: `AsUniTask`, `UniTask` -> `UniTask<AsyncUnit>`: `AsAsyncUnitUniTask`, `UniTask<T>` -> `UniTask`: `AsUniTask`. `UniTask<T>` -> `UniTask`'s conversion cost is free.
 
-If you want to convert async to coroutine, you can use `.ToCoroutine()`, this is useful to use only allow coroutine system.
+If you want to convert async to coroutine, you can use `.ToCoroutine()`, this is useful if you want to only allow using the coroutine system.
 
 UniTask can not await twice. This is a similar constraint to the [ValueTask/IValueTaskSource](https://docs.microsoft.com/en-us/dotnet/api/system.threading.tasks.valuetask-1?view=netcore-3.1) introduced in .NET Standard 2.1.
 
@@ -208,11 +213,13 @@ await task;
 await task; // NG, throws Exception
 ```
 
-Store to the class field, you can use `UniTask.Lazy` that gurantee call multipletimes. `.Preserve()` allows for multiple calls (internally cached results). This is useful when multiple calls in a function scope.
+Store to the class field, you can use `UniTask.Lazy` that supports calling multiple times. `.Preserve()` allows for multiple calls (internally cached results). This is useful when there are multiple calls in a function scope.
+
+Also `UniTaskCompletionSource` can await multiple times and await from many callers.
 
 Cancellation and Exception handling
 ---
-Some UniTask factory methods have `CancellationToken cancellationToken = default` parameter. Andalso some async operation for unity have `WithCancellation(CancellationToken)` and `ToUniTask(..., CancellationToken cancellation = default)` extension methods. 
+Some UniTask factory methods have a `CancellationToken cancellationToken = default` parameter. Also some async operations for Unity have `WithCancellation(CancellationToken)` and `ToUniTask(..., CancellationToken cancellation = default)` extension methods. 
 
 You can pass `CancellationToken` to parameter by standard [`CancellationTokenSource`](https://docs.microsoft.com/en-us/dotnet/api/system.threading.cancellationtokensource).
 
@@ -229,18 +236,18 @@ await UnityWebRequest.Get("http://google.co.jp").SendWebRequest().WithCancellati
 await UniTask.DelayFrame(1000, cancellationToken: cts.Token);
 ```
 
-CancellationToken can create by `CancellationTokenSource` or MonoBehaviour's extension method `GetCancellationTokenOnDestroy`.
+CancellationToken can be created by `CancellationTokenSource` or MonoBehaviour's extension method `GetCancellationTokenOnDestroy`.
 
 ```csharp
 // this CancellationToken lifecycle is same as GameObject.
 await UniTask.DelayFrame(1000, cancellationToken: this.GetCancellationTokenOnDestroy());
 ```
 
-When detect cancellation, all methods throws `OperationCanceledException` and propagate to upstream. `OperationCanceledException` is special exception, if not handled this exception, finally it is propagated to `UniTaskScheduler.UnobservedTaskException`.
+When cancellation is detected, all methods throw `OperationCanceledException` and propagate upstream. `OperationCanceledException` is a special exception, if this exception is not handled, it is propagated finally to `UniTaskScheduler.UnobservedTaskException`.
 
-Default behaviour of received unhandled exception is write log as exception. Log level can change by `UniTaskScheduler.UnobservedExceptionWriteLogType`. If you want to change custom beavhiour, set action to `UniTaskScheduler.UnobservedTaskException.`
+The default behaviour of received unhandled exception is to write log as exception. Log level can be changed using `UniTaskScheduler.UnobservedExceptionWriteLogType`. If you want to use custom behaviour, set an action to `UniTaskScheduler.UnobservedTaskException.`
 
-If you want to cancel behaviour in async UniTask method, throws `OperationCanceledException` manually.
+If you want to cancel behaviour in an async UniTask method, throw `OperationCanceledException` manually.
 
 ```csharp
 public async UniTask<int> FooAsync()
@@ -250,7 +257,7 @@ public async UniTask<int> FooAsync()
 }
 ```
 
-If you handle exception but want to ignore(propagete to global cancellation handling), use exception filter.
+If you handle an exception but want to ignore(propagate to global cancellation handling), use an exception filter.
 
 ```csharp
 public async UniTask<int> BarAsync()
@@ -267,7 +274,7 @@ public async UniTask<int> BarAsync()
 }
 ```
 
-throws/catch `OperationCanceledException` is slightly heavy, if you want to care performance, use `UniTask.SuppressCancellationThrow` to avoid OperationCanceledException throw. It returns `(bool IsCanceled, T Result)` instead of throw.
+throws/catch `OperationCanceledException` is slightly heavy, so if performance is a concern, use `UniTask.SuppressCancellationThrow` to avoid OperationCanceledException throw. It returns `(bool IsCanceled, T Result)` instead of throwing.
 
 ```csharp
 var (isCanceled, _) = await UniTask.DelayFrame(10, cancellationToken: cts.Token).SuppressCancellationThrow();
@@ -277,11 +284,11 @@ if (isCanceled)
 }
 ```
 
-Note: Only suppress throws if you call it directly into the most source method. Otherwise, the return value will be converted, but the entire pipeline will not be suppressed throws.
+Note: Only suppress throws if you call directly into the most source method. Otherwise, the return value will be converted, but the entire pipeline will not suppress throws.
 
 Progress
 ---
-Some async operation for unity have `ToUniTask(IProgress<float> progress = null, ...)` extension methods. 
+Some async operations for unity have `ToUniTask(IProgress<float> progress = null, ...)` extension methods. 
 
 ```csharp
 var progress = Progress.Create<float>(x => Debug.Log(x));
@@ -291,9 +298,9 @@ var request = await UnityWebRequest.Get("http://google.co.jp")
     .ToUniTask(progress: progress);
 ```
 
-You should not use standard `new System.Progress<T>`, because it causes allocation every times. Use `Cysharp.Threading.Tasks.Progress` instead. This progress factory has two methods, `Create` and `CreateOnlyValueChanged`. `CreateOnlyValueChanged` calls only when progress value changed.
+You should not use standard `new System.Progress<T>`, because it causes allocation every time. Use `Cysharp.Threading.Tasks.Progress` instead. This progress factory has two methods, `Create` and `CreateOnlyValueChanged`. `CreateOnlyValueChanged` calls only when the progress value has changed.
 
-Implements IProgress interface to caller is more better, there is no allocation of lambda.
+Implementing IProgress interface to caller is better as there is no lambda allocation.
 
 ```csharp
 public class Foo : MonoBehaviour, IProgress<float>
@@ -314,7 +321,7 @@ public class Foo : MonoBehaviour, IProgress<float>
 
 PlayerLoop
 ---
-UniTask is run on custom [PlayerLoop](https://docs.unity3d.com/ScriptReference/LowLevel.PlayerLoop.html). UniTask's playerloop based method(such as `Delay`, `DelayFrame`, `asyncOperation.ToUniTask`, etc...) accepts this `PlayerLoopTiming`.
+UniTask is run on a custom [PlayerLoop](https://docs.unity3d.com/ScriptReference/LowLevel.PlayerLoop.html). UniTask's playerloop based methods (such as `Delay`, `DelayFrame`, `asyncOperation.ToUniTask`, etc...) accept this `PlayerLoopTiming`.
 
 ```csharp
 public enum PlayerLoopTiming
@@ -339,28 +346,35 @@ public enum PlayerLoopTiming
 
     PostLateUpdate = 12,
     LastPostLateUpdate = 13
+    
+#if UNITY_2020_2_OR_NEWER
+    TimeUpdate = 14,
+    LastTimeUpdate = 15,
+#endif
 }
 ```
 
 It indicates when to run, you can check [PlayerLoopList.md](https://gist.github.com/neuecc/bc3a1cfd4d74501ad057e49efcd7bdae) to Unity's default playerloop and injected UniTask's custom loop.
 
-`PlayerLoopTiming.Update` is similar as `yield return null` in coroutine, but it is called before Update(Update and uGUI events(button.onClick, etc...) are called on `ScriptRunBehaviourUpdate`, yield return null is called on `ScriptRunDelayedDynamicFrameRate`). `PlayerLoopTiming.FixedUpdate` is similar as `WaitForFixedUpdate`, `PlayerLoopTiming.LastPostLateUpdate` is similar as `WaitForEndOfFrame` in coroutine.
+`PlayerLoopTiming.Update` is similar to `yield return null` in a coroutine, but it is called before Update(Update and uGUI events(button.onClick, etc...) are called on `ScriptRunBehaviourUpdate`, yield return null is called on `ScriptRunDelayedDynamicFrameRate`). `PlayerLoopTiming.FixedUpdate` is similar to `WaitForFixedUpdate`, `PlayerLoopTiming.LastPostLateUpdate` is similar to `WaitForEndOfFrame` in coroutine.
 
-`yield return null` and `UniTask.Yield` is similar but different. `yield return null` always return next frame but `UniTask.Yield` return next called, that is, call `UniTask.Yield(PlayerLoopTiming.Update)` on `PreUpdate`, it returns same frame. `UniTask.NextFrame()` gurantees return next frame, this would be expected to behave exactly the same as `yield return null`.
+> `await UniTask.WaitForEndOfFrame()` is not equivalent to coroutine's `yield return new WaitForEndOfFrame()`. Coroutine's WaitForEndOfFrame seems to run after the PlayerLoop is done. Some methods that require coroutine's end of frame(`ScreenCapture.CaptureScreenshotAsTexture`, `CommandBuffer`, etc) do not work correctly when replaced with async/await. In these cases, use a coroutine instead.
 
-> UniTask.Yield(without CancellationToken) is a special type, returns `YieldAwaitable` and run on YieldRunner. It is most lightweight and faster.
+`yield return null` and `UniTask.Yield` are similar but different. `yield return null` always returns next frame but `UniTask.Yield` returns next called. That is, call `UniTask.Yield(PlayerLoopTiming.Update)` on `PreUpdate`, it returns same frame. `UniTask.NextFrame()` guarantees return next frame, you can expect this to behave exactly the same as `yield return null`.
 
-AsyncOperation is returned from native timing. For example, await `SceneManager.LoadSceneAsync` is returned from `EarlyUpdate.UpdatePreloading` and after called, loaded scene's `Start` called from `EarlyUpdate.ScriptRunDelayedStartupFrame`. Also `await UnityWebRequest` is returned from `EarlyUpdate.ExecuteMainThreadJobs`.
+> UniTask.Yield(without CancellationToken) is a special type, returns `YieldAwaitable` and run on YieldRunner. It is most lightweight and fastest.
 
-In UniTask, await directly and `WithCancellation` use native timing, `ToUniTask` use specified timing. This is usually not a particular problem, but with `LoadSceneAsync`, causes different order of Start and continuation after await. so recommend not to use `LoadSceneAsync.ToUniTask`.
+`AsyncOperation` is returned from native timing. For example, await `SceneManager.LoadSceneAsync` is returned from `EarlyUpdate.UpdatePreloading` and after being called, the loaded scene's `Start` is called from `EarlyUpdate.ScriptRunDelayedStartupFrame`. Also `await UnityWebRequest` is returned from `EarlyUpdate.ExecuteMainThreadJobs`.
 
-In stacktrace, you can check where is running in playerloop.
+In UniTask, await directly and `WithCancellation` use native timing, `ToUniTask` uses specified timing. This is usually not a particular problem, but with `LoadSceneAsync`, it causes a different order of Start and continuation after await. So it is recommended not to use `LoadSceneAsync.ToUniTask`.
+
+In the stacktrace, you can check where it is running in playerloop.
 
 ![image](https://user-images.githubusercontent.com/46207/83735571-83caea80-a68b-11ea-8d22-5e22864f0d24.png)
 
-In default, UniTask's PlayerLoop is initialized at `[RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.BeforeSceneLoad)]`.
+By default, UniTask's PlayerLoop is initialized at `[RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.BeforeSceneLoad)]`.
 
-The order in which methods are called in BeforeSceneLoad is indeterminate, so if you want to use UniTask in other BeforeSceneLoad methods, you should try to initialize it before this.
+The order in which methods are called in BeforeSceneLoad is nondeterministic, so if you want to use UniTask in other BeforeSceneLoad methods, you should try to initialize it before this.
 
 ```csharp
 // AfterAssembliesLoaded is called before BeforeSceneLoad
@@ -372,9 +386,9 @@ public static void InitUniTaskLoop()
 }
 ```
 
-If you import Unity's `Entities` package, that reset custom player loop to default at `BeforeSceneLoad` and inject ECS's loop. When Unity call ECS's inject method after UniTask's initialize method, UniTask will no longer work.
+If you import Unity's `Entities` package, that resets the custom player loop to default at `BeforeSceneLoad` and injects ECS's loop. When Unity calls ECS's inject method after UniTask's initialize method, UniTask will no longer work.
 
-To solve this issue, you can re-initialize UniTask PlayerLoop after ECS initialized.
+To solve this issue, you can re-initialize the UniTask PlayerLoop after ECS is initialized.
 
 ```csharp
 // Get ECS Loop.
@@ -384,9 +398,19 @@ var playerLoop = ScriptBehaviourUpdateOrder.CurrentPlayerLoop;
 PlayerLoopHelper.Initialize(ref playerLoop);
 ```
 
+You can diagnose whether UniTask's player loop is ready by calling `PlayerLoopHelper.IsInjectedUniTaskPlayerLoop()`. And also `PlayerLoopHelper.DumpCurrentPlayerLoop` logs all current playerloops to console.
+
+```csharp
+void Start()
+{
+    UnityEngine.Debug.Log("UniTaskPlayerLoop ready? " + PlayerLoopHelper.IsInjectedUniTaskPlayerLoop());
+    PlayerLoopHelper.DumpCurrentPlayerLoop();
+}
+```
+
 async void vs async UniTaskVoid
 ---
-`async void` is a standard C# task system so does not run on UniTask systems. It is better not to use. `async UniTaskVoid` is a lightweight version of `async UniTask` because it does not have awaitable completion and report error immediately to `UniTaskScheduler.UnobservedTaskException`. If you don't require to await it(fire and forget), use `UniTaskVoid` is better. Unfortunately to dismiss warning, require to using with `Forget()`.
+`async void` is a standard C# task system so it does not run on UniTask systems. It is better not to use it. `async UniTaskVoid` is a lightweight version of `async UniTask` because it does not have awaitable completion and reports errors immediately to `UniTaskScheduler.UnobservedTaskException`. If you don't require awaiting (fire and forget), using `UniTaskVoid` is better. Unfortunately to dismiss warning, you're required to call `Forget()`.
 
 ```csharp
 public async UniTaskVoid FireAndForgetMethod()
@@ -401,7 +425,7 @@ public void Caller()
 }
 ```
 
-Also UniTask have `Forget` method, it is similar with UniTaskVoid and same effects with it. However still UniTaskVoid is more efficient if completely do not use await。
+Also UniTask has the `Forget` method, it is similar to `UniTaskVoid` and has the same effects. However `UniTaskVoid` is more efficient if you completely don't use `await`。
 
 ```csharp
 public async UniTask DoAsync()
@@ -416,7 +440,7 @@ public void Caller()
 }
 ```
 
-Using async lambda in register event, it is used `async void`. To avoid it, you can use `UniTask.Action` or `UniTask.UnityAction` that creates delegate via `async UniTaskVoid` lambda.
+To use an async lambda registered to an event, don't use `async void`. Instead you can use `UniTask.Action` or `UniTask.UnityAction`, both of which create a delegate via `async UniTaskVoid` lambda.
 
 ```csharp
 Action actEvent;
@@ -431,7 +455,7 @@ actEvent += UniTask.Action(async () => { await UniTask.Yield(); });
 unityEvent += UniTask.UnityAction(async () => { await UniTask.Yield(); });
 ```
 
-`UniTaskVoid` can also use in MonoBehaviour's `Start` method.
+`UniTaskVoid` can also be used in MonoBehaviour's `Start` method.
 
 ```csharp
 class Sample : MonoBehaviour
@@ -445,7 +469,7 @@ class Sample : MonoBehaviour
 
 UniTaskTracker
 ---
-useful for check(leak) UniTasks. You can open tracker window in `Window -> UniTask Tracker`.
+useful for checking (leaked) UniTasks. You can open tracker window in `Window -> UniTask Tracker`.
 
 ![image](https://user-images.githubusercontent.com/46207/83527073-4434bf00-a522-11ea-86e9-3b3975b26266.png)
 
@@ -455,15 +479,15 @@ useful for check(leak) UniTasks. You can open tracker window in `Window -> UniTa
 * Enable Tracking(Toggle) - Start to track async/await UniTask. Performance impact: low.
 * Enable StackTrace(Toggle) - Capture StackTrace when task is started. Performance impact: high.
 
-For debug use, enable tracking and capture stacktrace is useful but it it decline performance. Recommended usage is enable both to find task leak, and when done, finally disable both.
+UniTaskTracker is intended for debugging use only as enabling tracking and capturing stacktraces is useful but has a heavy performance impact. Recommended usage is to enable both tracking and stacktraces to find task leaks and to disable them both when done.
 
 External Assets
 ---
-In default, UniTask supports TextMeshPro(`BindTo(TMP_Text)` and `TMP_InputField` event extensions like standard uGUI `InputField`), DOTween(`Tween` as awaitable) and Addressables(`AsyncOperationHandle` and `AsyncOpereationHandle<T>` as awaitable).
+By default, UniTask supports TextMeshPro(`BindTo(TMP_Text)` and `TMP_InputField` event extensions like standard uGUI `InputField`), DOTween(`Tween` as awaitable) and Addressables(`AsyncOperationHandle` and `AsyncOperationHandle<T>` as awaitable).
 
-There are defined in separated asmdef like `UniTask.TextMeshPro`, `UniTask.DOTween`, `UniTask.Addressables`.
+There are defined in separated asmdefs like `UniTask.TextMeshPro`, `UniTask.DOTween`, `UniTask.Addressables`.
 
-TextMeshPro and Addressables support are automatically enabled when import there package from package manager. However DOTween support, require to `com.demigiant.dotween` import from [OpenUPM](https://openupm.com/packages/com.demigiant.dotween/) or define `UNITASK_DOTWEEN_SUPPORT` to enable it.
+TextMeshPro and Addressables support are automatically enabled when importing their packages from package manager. However for DOTween support, it is required to import `com.demigiant.dotween` from [OpenUPM](https://openupm.com/packages/com.demigiant.dotween/) or to define `UNITASK_DOTWEEN_SUPPORT` to enable it.
 
 ```csharp
 // sequential
@@ -478,12 +502,14 @@ await UniTask.WhenAll(
     transform.DOScale(10, 3).WithCancellation(ct));
 ```
 
+DOTween support's default behaviour(`await`, `WithCancellation`, `ToUniTask`) awaits tween is killed. It works on both Complete(true/false) and Kill(true/false). But if you want to reuse tweens (`SetAutoKill(false)`), it does not work as expected. If you want to await for another timing, the following extension methods exist in Tween, `AwaitForComplete`, `AwaitForPause`, `AwaitForPlay`, `AwaitForRewind`, `AwaitForStepComplete`.
+
 AsyncEnumerable and Async LINQ
 ---
-Unity 2020.2.0a12 supports C# 8.0 so you can use `await foreach`. This is the new Update notation in async era.
+Unity 2020.2 supports C# 8.0 so you can use `await foreach`. This is the new Update notation in the async era.
 
 ```csharp
-// Unity 2020.2.0a12, C# 8.0
+// Unity 2020.2, C# 8.0
 await foreach (var _ in UniTaskAsyncEnumerable.EveryUpdate(token))
 {
     Debug.Log("Update() " + Time.frameCount);
@@ -508,7 +534,7 @@ await okButton.OnClickAsAsyncEnumerable().Where((x, i) => i % 2 == 0).ForEachAsy
 });
 ```
 
-Fire and Forget style(for example, event handling), also you can use `Subscribe`.
+Fire and Forget style(for example, event handling), you can also use `Subscribe`.
 
 ```csharp
 okButton.OnClickAsAsyncEnumerable().Where((x, i) => i % 2 == 0).Subscribe(_ =>
@@ -532,7 +558,7 @@ SelectAwaitWithCancellation(Func<T, CancellationToken, UniTask<TR>> selector)
 
 If you want to use the `async` method inside the func, use the `***Await` or `***AwaitWithCancellation`.
 
-How to create async iterator, C# 8.0 supports async iterator(`async yield return`) but it only allows `IAsyncEnumerable<T>` and of course requires C# 8.0. UniTask supports `UniTaskAsyncEnumerable.Create` method to create custom async iterator.
+How to create an async iterator: C# 8.0 supports async iterator(`async yield return`) but it only allows `IAsyncEnumerable<T>` and of course requires C# 8.0. UniTask supports `UniTaskAsyncEnumerable.Create` method to create custom async iterator.
 
 ```csharp
 // IAsyncEnumerable, C# 8.0 version of async iterator. ( do not use this style, IAsyncEnumerable is not controled in UniTask).
@@ -608,7 +634,7 @@ async UniTask TripleClick(CancellationToken token)
 }
 ```
 
-All MonoBehaviour message events can convert async-streams by `AsyncTriggers` that can enable by `using Cysharp.Threading.Tasks.Triggers;`.
+All MonoBehaviour message events can convert async-streams by `AsyncTriggers` that can be enabled by `using Cysharp.Threading.Tasks.Triggers;`.
 
 ```csharp
 using Cysharp.Threading.Tasks.Triggers;
@@ -624,7 +650,7 @@ async UniTaskVoid MonitorCollision()
 }
 ```
 
-Similar as uGUI event, AsyncTrigger can get by `GetAsync***Trigger` and trigger it self is UniTaskAsyncEnumerable.
+Similar to uGUI event, AsyncTrigger can be created using `GetAsync***Trigger` and triggers itself as UniTaskAsyncEnumerable.
 
 ```csharp
 // use await multiple times, get AsyncTriggerHandler is more efficient.
@@ -641,7 +667,7 @@ await this.GetAsyncMoveTrigger().ForEachAsync(axisEventData =>
 });
 ```
 
-`AsyncReactiveProperty`, `AsyncReadOnlyReactiveProperty` is UniTask version of UniTask's ReactiveProperty. `BindTo` extension method of `IUniTaskAsyncEnumerable<T>` for binding asynchronous stream values to Unity components(Text/Selectable/TMP/Text).
+`AsyncReactiveProperty`, `AsyncReadOnlyReactiveProperty` is UniTask's version of ReactiveProperty. `BindTo` extension method of `IUniTaskAsyncEnumerable<T>` for binding asynchronous stream values to Unity components(Text/Selectable/TMP/Text).
 
 ```csharp
 var rp = new AsyncReactiveProperty<int>(99);
@@ -676,9 +702,9 @@ await button.OnClickAsAsyncEnumerable().ForEachAwaitAsync(async x =>
 });
 ```
 
-It is useful(prevent double-click) but not useful in sometimes.
+It is useful (prevent double-click) but not useful sometimes.
 
-Using `Queue()` method, which will also queue events during asynchronous processing.
+Using the `Queue()` method will also queue events during asynchronous processing.
 
 ```csharp
 // queued message in asynchronous processing
@@ -699,13 +725,13 @@ button.OnClickAsAsyncEnumerable().Subscribe(async x =>
 
 Channel
 ---
-`Channel` is same as [System.Threading.Tasks.Channels](https://docs.microsoft.com/ja-jp/dotnet/api/system.threading.channels?view=netcore-3.1) that is similar as GoLang Channel.
+`Channel` is the same as [System.Threading.Tasks.Channels](https://docs.microsoft.com/ja-jp/dotnet/api/system.threading.channels?view=netcore-3.1) which is similar to a GoLang Channel.
 
-Currently only supports multiple-producer, single-consumer unbounded channel. It can create by `Channel.CreateSingleConsumerUnbounded<T>()`.
+Currently it only supports multiple-producer, single-consumer unbounded channels. It can create by `Channel.CreateSingleConsumerUnbounded<T>()`.
 
-For producer(`.Writer`), `TryWrite` to push value and `TryComplete` to complete channel. For consumer(`.Reader`), `TryRead`, `WaitToReadAsync`, `ReadAsync`, `Completion` and `ReadAllAsync` to read queued messages.
+For producer(`.Writer`), use `TryWrite` to push value and `TryComplete` to complete channel. For consumer(`.Reader`), use `TryRead`, `WaitToReadAsync`, `ReadAsync`, `Completion` and `ReadAllAsync` to read queued messages.
 
-`ReadAllAsync` returns `IUniTaskAsyncEnumerable<T>` so query LINQ operators. Reader only allows single-consumer but use `.Publish()` query operator to enable multicast message. For example, make pub/sub utility.
+`ReadAllAsync` returns `IUniTaskAsyncEnumerable<T>` so query LINQ operators. Reader only allows single-consumer but uses `.Publish()` query operator to enable multicast message. For example, make pub/sub utility.
 
 ```csharp
 public class AsyncMessageBroker<T> : IDisposable
@@ -742,7 +768,7 @@ public class AsyncMessageBroker<T> : IDisposable
 
 For Unit Testing
 ---
-Unity's `[UnityTest]` attribute can test coroutine(IEnumerator) but can not test async. `UniTask.ToCoroutine` bridges async/await to coroutine so you can test async method.
+Unity's `[UnityTest]` attribute can test coroutine(IEnumerator) but can not test async. `UniTask.ToCoroutine` bridges async/await to coroutine so you can test async methods.
 
 ```csharp
 [UnityTest]
@@ -765,11 +791,33 @@ public IEnumerator DelayIgnore() => UniTask.ToCoroutine(async () =>
 });
 ```
 
-UniTask itself's unit test is written by Unity Test Runner and [Cysharp/RuntimeUnitTestToolkit](https://github.com/Cysharp/RuntimeUnitTestToolkit) to check on CI and IL2CPP working.
+UniTask's own unit tests are written using Unity Test Runner and [Cysharp/RuntimeUnitTestToolkit](https://github.com/Cysharp/RuntimeUnitTestToolkit) to integrate with CI and check if IL2CPP is working.
+
+ThreadPool limitation
+---
+Most UniTask methods run on a single thread (PlayerLoop), with only `UniTask.Run` and `UniTask.SwitchToThreadPool` running on a thread pool. If you use a thread pool, it won't work with WebGL and so on.
+
+`UniTask.Run` will be deprecated in the future (marked with an Obsolete) and only `RunOnThreadPool` will be used. If you use `UniTask.Run`, consider whether you can use `UniTask.Create` or `UniTask.Void`.
+
+IEnumerator.ToUniTask limitation
+---
+You can convert coroutine(IEnumerator) to UniTask(or await directly) but it has some limitations.
+
+* `WaitForEndOfFrame`/`WaitForFixedUpdate`/`Coroutine` is not supported.
+* Consuming loop timing is not the same as `StartCoroutine`, it uses the specified `PlayerLoopTiming` and the default `PlayerLoopTiming.Update` is run before MonoBehaviour's `Update` and `StartCoroutine`'s loop.
+
+If you want fully compatible conversion from coroutine to async, use the `IEnumerator.ToUniTask(MonoBehaviour coroutineRunner)` overload. It executes StartCoroutine on an instance of the argument MonoBehaviour and waits for it to complete in UniTask.
+
+For UnityEditor
+---
+UniTask can run on Unity Editor like an Editor Coroutine. However, there are some limitations.
+
+* Delay, DelayFrame do not work correctly because they can not get deltaTime in editor. Return the result of the await immediately; you can use `DelayType.Realtime` to wait for the right time.
+* All PlayerLoopTiming run on the timing `EditorApplication.update`.
 
 Compare with Standard Task API
 ---
-UniTask has many standard Task-like APIs. This table shows what is the alternative apis.
+UniTask has many standard Task-like APIs. This table shows what the alternative apis are.
 
 Use standard type.
 
@@ -815,7 +863,7 @@ Use UniTask type.
 
 Pooling Configuration
 ---
-UniTask is aggressively caching async promise object to achive zero allocation. In default, cache all promises but you can configure `TaskPool.SetMaxPoolSize` to your value, the value indicates cache size per type. `TaskPool.GetCacheSizeInfo` returns current cached object in pool.
+UniTask aggressively caches async promise objects to achieve zero allocation (for technical details, see blog post [UniTask v2 — Zero Allocation async/await for Unity, with Asynchronous LINQ](https://medium.com/@neuecc/unitask-v2-zero-allocation-async-await-for-unity-with-asynchronous-linq-1aa9c96aa7dd)). By default, it caches all promises but you can configure `TaskPool.SetMaxPoolSize` to your value, the value indicates cache size per type. `TaskPool.GetCacheSizeInfo` returns currently cached objects in pool.
 
 ```csharp
 foreach (var (type, size) in TaskPool.GetCacheSizeInfo())
@@ -824,19 +872,44 @@ foreach (var (type, size) in TaskPool.GetCacheSizeInfo())
 }
 ```
 
-> In UnityEditor profiler shows allocation of compiler generated AsyncStateMachine but it only occurs in debug(development) build. C# Compiler generate AsyncStateMachine as class on Debug build and as struct on Release build.
+Allocation on Profiler
+---
+In UnityEditor the profiler shows allocation of compiler generated AsyncStateMachine but it only occurs in debug(development) build. C# Compiler generates AsyncStateMachine as class on Debug build and as struct on Release build.
+
+Unity supports Code Optimization option starting in 2020.1 (right, footer).
+
+![](https://user-images.githubusercontent.com/46207/89967342-2f944600-dc8c-11ea-99fc-0b74527a16f6.png)
+
+You can change C# compiler optimization to release to remove AsyncStateMachine allocation in development builds. This optimization option can also be set via `Compilation.CompilationPipeline-codeOptimization`, and `Compilation.CodeOptimization`.
+
+UniTaskSynchronizationContext
+---
+Unity's default SynchronizationContext(`UnitySynchronizationContext`) is a poor implementation for performance. UniTask bypasses `SynchronizationContext`(and `ExecutionContext`) so it does not use it but if exists in `async Task`, still used it. `UniTaskSynchronizationContext` is a replacement of `UnitySynchronizationContext` which is better for performance.
+
+```csharp
+public class SyncContextInjecter
+{
+    [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
+    public static void Inject()
+    {
+        SynchronizationContext.SetSynchronizationContext(new UniTaskSynchronizationContext());
+    }
+}
+```
+
+This is an optional choice and is not always recommended; `UniTaskSynchronizationContext` is less performant than `async UniTask` and is not a complete UniTask replacement. It also does not guarantee full behavioral compatibility with the `UnitySynchronizationContext`.
 
 API References
 ---
-UniTask's API References is hosted at [cysharp.github.io/UniTask](https://cysharp.github.io/UniTask/api/Cysharp.Threading.Tasks.html) by [DocFX](https://dotnet.github.io/docfx/) and [Cysharp/DocfXTemplate](https://github.com/Cysharp/DocfxTemplate).
+UniTask's API References are hosted at [cysharp.github.io/UniTask](https://cysharp.github.io/UniTask/api/Cysharp.Threading.Tasks.html) by [DocFX](https://dotnet.github.io/docfx/) and [Cysharp/DocfXTemplate](https://github.com/Cysharp/DocfxTemplate).
 
-For example, UniTask's factory methods can see at [UniTask#methods](https://cysharp.github.io/UniTask/api/Cysharp.Threading.Tasks.UniTask.html#methods-1). UniTaskAsyncEnumerable's factory/extension methods can see at [UniTaskAsyncEnumerable#methods](https://cysharp.github.io/UniTask/api/Cysharp.Threading.Tasks.Linq.UniTaskAsyncEnumerable.html#methods-1).
+For example, UniTask's factory methods can be seen at [UniTask#methods](https://cysharp.github.io/UniTask/api/Cysharp.Threading.Tasks.UniTask.html#methods-1). UniTaskAsyncEnumerable's factory/extension methods can be seen at [UniTaskAsyncEnumerable#methods](https://cysharp.github.io/UniTask/api/Cysharp.Threading.Tasks.Linq.UniTaskAsyncEnumerable.html#methods-1).
 
 UPM Package
 ---
 ### Install via git URL
 
-After Unity 2019.3.4f1, Unity 2020.1a21, that support path query parameter of git package. You can add `https://github.com/Cysharp/UniTask.git?path=src/UniTask/Assets/Plugins/UniTask` to Package Manager
+Requires a version of unity that supports path query parameter for git packages (Unity >= 2019.3.4f1, Unity >= 2020.1a21). You can add `https://github.com/Cysharp/UniTask.git?path=src/UniTask/Assets/Plugins/UniTask` to Package Manager
 
 ![image](https://user-images.githubusercontent.com/46207/79450714-3aadd100-8020-11ea-8aae-b8d87fc4d7be.png)
 
@@ -844,7 +917,7 @@ After Unity 2019.3.4f1, Unity 2020.1a21, that support path query parameter of gi
 
 or add `"com.cysharp.unitask": "https://github.com/Cysharp/UniTask.git?path=src/UniTask/Assets/Plugins/UniTask"` to `Packages/manifest.json`.
 
-If you want to set a target version, UniTask is using `*.*.*` release tag so you can specify a version like `#2.0.24`. For example `https://github.com/Cysharp/UniTask.git?path=src/UniTask/Assets/Plugins/UniTask#2.0.24`.
+If you want to set a target version, UniTask uses the `*.*.*` release tag so you can specify a version like `#2.1.0`. For example `https://github.com/Cysharp/UniTask.git?path=src/UniTask/Assets/Plugins/UniTask#2.1.0`.
 
 ### Install via OpenUPM
 
@@ -860,11 +933,11 @@ For .NET Core, use NuGet.
 
 > PM> Install-Package [UniTask](https://www.nuget.org/packages/UniTask)
 
-UniTask of .NET Core version is a subset of Unity UniTask, removed PlayerLoop dependent methods.
+UniTask of .NET Core version is a subset of Unity UniTask with PlayerLoop dependent methods removed.
 
 It runs at higher performance than the standard Task/ValueTask, but you should be careful to ignore the ExecutionContext/SynchronizationContext when using it. `AysncLocal` also does not work because it ignores ExecutionContext.
 
-If you use UniTask internally, but provide ValueTask as an external API, you can write like the following(Inspired by [PooledAwait](https://github.com/mgravell/PooledAwait)).
+If you use UniTask internally, but provide ValueTask as an external API, you can write it like the following(Inspired by [PooledAwait](https://github.com/mgravell/PooledAwait)).
 
 ```csharp
 public class ZeroAllocAsyncAwaitInDotNetCore
@@ -897,7 +970,7 @@ public ValueTask TestAsync()
 
 .NET Core version is intended to allow users to use UniTask as an interface when sharing code with Unity (such as [Cysharp/MagicOnion](https://github.com/Cysharp/MagicOnion/)). .NET Core version of UniTask enables smooth code sharing.
 
-Utility methods such as WhenAll which is equivalent to UniTask are provided as [Cysharp/ValueTaskSupplement](https://github.com/Cysharp/ValueTaskSupplement).
+Utility methods such as WhenAll which are equivalent to UniTask are provided as [Cysharp/ValueTaskSupplement](https://github.com/Cysharp/ValueTaskSupplement).
 
 License
 ---

src/UniTask.NetCore/NetCore/UniTask.Yield.cs

@@ -62,7 +62,8 @@ namespace Cysharp.Threading.Tasks
             sealed class ThreadPoolWorkItem : IThreadPoolWorkItem, ITaskPoolNode<ThreadPoolWorkItem>
             {
                 static TaskPool<ThreadPoolWorkItem> pool;
-                public ThreadPoolWorkItem NextNode { get; set; }
+                ThreadPoolWorkItem nextNode;
+                public ref ThreadPoolWorkItem NextNode => ref nextNode;
 
                 static ThreadPoolWorkItem()
                 {

src/UniTask.NetCore/UniTask.NetCore.csproj

@@ -38,6 +38,7 @@
 ..\UniTask\Assets\Plugins\UniTask\Runtime\Internal\ContinuationQueue.cs;
 ..\UniTask\Assets\Plugins\UniTask\Runtime\Internal\UnityWebRequestExtensions.cs;
   
+..\UniTask\Assets\Plugins\UniTask\Runtime\UniTaskSynchronizationContext.cs;
 ..\UniTask\Assets\Plugins\UniTask\Runtime\CancellationTokenSourceExtensions.cs;
 ..\UniTask\Assets\Plugins\UniTask\Runtime\EnumeratorAsyncExtensions.cs;
 ..\UniTask\Assets\Plugins\UniTask\Runtime\PlayerLoopHelper.cs;

src/UniTask.NetCoreSandbox/QueueCheck.cs

@@ -10,11 +10,14 @@ public class QueueCheck
 {
     Node node1 = new Node();
     Node node2 = new Node();
+    RefNode refNode1 = new RefNode();
+    RefNode refNode2 = new RefNode();
     Queue<Node> q1 = new Queue<Node>();
     Stack<Node> s1 = new Stack<Node>();
     ConcurrentQueue<Node> cq = new ConcurrentQueue<Node>();
     ConcurrentStack<Node> cs = new ConcurrentStack<Node>();
     static TaskPool<Node> pool;
+    static TaskPoolRefNode<RefNode> poolRefNode;
     static TaskPoolEqualNull<Node> poolEqualNull;
     static TaskPoolClass<Node> poolClass = new TaskPoolClass<Node>();
     static TaskPoolWithoutSize<Node> poolWithoutSize;
@@ -82,6 +85,14 @@ public class QueueCheck
         pool.TryPop(out _);
         pool.TryPop(out _);
     }
+    [Benchmark]
+    public void TaskPoolRefNode()
+    {
+        poolRefNode.TryPush(refNode1);
+        poolRefNode.TryPush(refNode2);
+        poolRefNode.TryPop(out _);
+        poolRefNode.TryPop(out _);
+    }
 
     [Benchmark]
     public void TaskPoolEqualNull()
@@ -130,6 +141,18 @@ public interface ITaskPoolNode<T>
     T NextNode { get; set; }
 }
 
+public sealed class RefNode :ITaskPoolRefNode<RefNode>
+{
+    RefNode nextNode;
+    public ref RefNode NextNode => ref nextNode;
+}
+
+public interface ITaskPoolRefNode<T>
+{
+    ref T NextNode { get; }
+}
+
+
 // mutable struct, don't mark readonly.
 [StructLayout(LayoutKind.Auto)]
 public struct TaskPoolWithoutLock<T>
@@ -237,6 +260,60 @@ public struct TaskPool<T>
         return false;
     }
 }
+[StructLayout(LayoutKind.Auto)]
+public struct TaskPoolRefNode<T>
+    where T : class, ITaskPoolRefNode<T>
+{
+    int gate;
+    int size;
+    T root;
+
+    public int Size => size;
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public bool TryPop(out T result)
+    {
+        if (Interlocked.CompareExchange(ref gate, 1, 0) == 0)
+        {
+            var v = root;
+            if (!(v is null))
+            {
+                ref var nextNode = ref v.NextNode;
+                root = nextNode;
+                nextNode = null;
+                size--;
+                result = v;
+                Volatile.Write(ref gate, 0);
+                return true;
+            }
+
+            Volatile.Write(ref gate, 0);
+        }
+        result = default;
+        return false;
+    }
+
+    [MethodImpl(MethodImplOptions.AggressiveInlining)]
+    public bool TryPush(T item)
+    {
+        if (Interlocked.CompareExchange(ref gate, 1, 0) == 0)
+        {
+            //if (size < TaskPool.MaxPoolSize)
+            {
+                item.NextNode = root;
+                root = item;
+                size++;
+                Volatile.Write(ref gate, 0);
+                return true;
+            }
+            //else
+            {
+                //  Volatile.Write(ref gate, 0);
+            }
+        }
+        return false;
+    }
+}
 
 [StructLayout(LayoutKind.Auto)]
 public struct TaskPoolEqualNull<T>

src/UniTask.NetCoreTests/WithCancellationTest.cs

@@ -0,0 +1,40 @@
+using Cysharp.Threading.Tasks;
+using FluentAssertions;
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using Xunit;
+
+namespace NetCoreTests
+{
+    public class WithCancellationTest
+    {
+        [Fact]
+        public async Task Standard()
+        {
+            CancellationTokenSource cts = new CancellationTokenSource();
+
+            var v = await UniTask.Run(() => 10).WithCancellation(cts.Token);
+
+            v.Should().Be(10);
+        }
+
+        [Fact]
+        public async Task Cancel()
+        {
+            CancellationTokenSource cts = new CancellationTokenSource();
+
+            var t = UniTask.Create(async () =>
+            {
+                await Task.Delay(TimeSpan.FromSeconds(1));
+                return 10;
+            }).WithCancellation(cts.Token);
+
+            cts.Cancel();
+
+            (await Assert.ThrowsAsync<OperationCanceledException>(async () => await t)).CancellationToken.Should().Be(cts.Token);
+        }
+    }
+}

src/UniTask/Assets/Editor/EditorRunnerChecker.cs

@@ -20,8 +20,9 @@ public static class EditorRunnerChecker
     {
         Debug.Log("Start");
 
-        var r = await UnityWebRequest.Get("https://bing.com/").SendWebRequest().ToUniTask();
-        Debug.Log(r.downloadHandler.text.Substring(0, 100));
+        //var r = await UnityWebRequest.Get("https://bing.com/").SendWebRequest().ToUniTask();
+        //Debug.Log(r.downloadHandler.text.Substring(0, 100));
+        await UniTask.Yield();
 
         Debug.Log("End");
     }

src/UniTask/Assets/Plugins/UniTask/Editor/UniTask.Editor.asmdef

@@ -10,7 +10,7 @@
     "allowUnsafeCode": false,
     "overrideReferences": false,
     "precompiledReferences": [],
-    "autoReferenced": true,
+    "autoReferenced": false,
     "defineConstraints": [],
     "versionDefines": [],
     "noEngineReferences": false

src/UniTask/Assets/Plugins/UniTask/Runtime/AsyncReactiveProperty.cs

@@ -87,7 +87,8 @@ namespace Cysharp.Threading.Tasks
             static Action<object> cancellationCallback = CancellationCallback;
 
             static TaskPool<WaitAsyncSource> pool;
-            WaitAsyncSource ITaskPoolNode<WaitAsyncSource>.NextNode { get; set; }
+            WaitAsyncSource nextNode;
+            ref WaitAsyncSource ITaskPoolNode<WaitAsyncSource>.NextNode => ref nextNode;
 
             static WaitAsyncSource()
             {
@@ -404,7 +405,8 @@ namespace Cysharp.Threading.Tasks
             static Action<object> cancellationCallback = CancellationCallback;
 
             static TaskPool<WaitAsyncSource> pool;
-            WaitAsyncSource ITaskPoolNode<WaitAsyncSource>.NextNode { get; set; }
+            WaitAsyncSource nextNode;
+            ref WaitAsyncSource ITaskPoolNode<WaitAsyncSource>.NextNode => ref nextNode;
 
             static WaitAsyncSource()
             {

src/UniTask/Assets/Plugins/UniTask/Runtime/CancellationTokenExtensions.cs

@@ -30,10 +30,10 @@ namespace Cysharp.Threading.Tasks
                 return ToCancellationToken(task);
             }
 
-            var cts = new CancellationTokenSource();
+            var cts = CancellationTokenSource.CreateLinkedTokenSource(linkToken);
             ToCancellationTokenCore(task, cts).Forget();
 
-            return CancellationTokenSource.CreateLinkedTokenSource(linkToken).Token;
+            return cts.Token;
         }
 
         public static CancellationToken ToCancellationToken<T>(this UniTask<T> task)

src/UniTask/Assets/Plugins/UniTask/Runtime/CompilerServices/StateMachineRunner.cs

@@ -87,7 +87,8 @@ namespace Cysharp.Threading.Tasks.CompilerServices
             TaskPool.RegisterSizeGetter(typeof(AsyncUniTaskVoid<TStateMachine>), () => pool.Size);
         }
 
-        public AsyncUniTaskVoid<TStateMachine> NextNode { get; set; }
+        AsyncUniTaskVoid<TStateMachine> nextNode;
+        public ref AsyncUniTaskVoid<TStateMachine> NextNode => ref nextNode;
 
         public void Return()
         {
@@ -157,7 +158,8 @@ namespace Cysharp.Threading.Tasks.CompilerServices
             result.stateMachine = stateMachine; // copy struct StateMachine(in release build).
         }
 
-        public AsyncUniTask<TStateMachine> NextNode { get; set; }
+        AsyncUniTask<TStateMachine> nextNode;
+        public ref AsyncUniTask<TStateMachine> NextNode => ref nextNode;
 
         static AsyncUniTask()
         {
@@ -279,7 +281,8 @@ namespace Cysharp.Threading.Tasks.CompilerServices
             result.stateMachine = stateMachine; // copy struct StateMachine(in release build).
         }
 
-        public AsyncUniTask<TStateMachine, T> NextNode { get; set; }
+        AsyncUniTask<TStateMachine, T> nextNode;
+        public ref AsyncUniTask<TStateMachine, T> NextNode => ref nextNode;
 
         static AsyncUniTask()
         {

src/UniTask/Assets/Plugins/UniTask/Runtime/EnumeratorAsyncExtensions.cs

@@ -32,10 +32,24 @@ namespace Cysharp.Threading.Tasks
             return new UniTask(EnumeratorPromise.Create(enumerator, timing, cancellationToken, out var token), token);
         }
 
+        public static UniTask ToUniTask(this IEnumerator enumerator, MonoBehaviour coroutineRunner)
+        {
+            var source = AutoResetUniTaskCompletionSource.Create();
+            coroutineRunner.StartCoroutine(Core(enumerator, coroutineRunner, source));
+            return source.Task;
+        }
+
+        static IEnumerator Core(IEnumerator inner, MonoBehaviour coroutineRunner, AutoResetUniTaskCompletionSource source)
+        {
+            yield return coroutineRunner.StartCoroutine(inner);
+            source.TrySetResult();
+        }
+
         sealed class EnumeratorPromise : IUniTaskSource, IPlayerLoopItem, ITaskPoolNode<EnumeratorPromise>
         {
             static TaskPool<EnumeratorPromise> pool;
-            public EnumeratorPromise NextNode { get; set; }
+            EnumeratorPromise nextNode;
+            public ref EnumeratorPromise NextNode => ref nextNode;
 
             static EnumeratorPromise()
             {
@@ -44,6 +58,9 @@ namespace Cysharp.Threading.Tasks
 
             IEnumerator innerEnumerator;
             CancellationToken cancellationToken;
+            int initialFrame;
+            bool loopRunning;
+            bool calledGetResult;
 
             UniTaskCompletionSourceCore<object> core;
 
@@ -66,10 +83,18 @@ namespace Cysharp.Threading.Tasks
 
                 result.innerEnumerator = ConsumeEnumerator(innerEnumerator);
                 result.cancellationToken = cancellationToken;
-
-                PlayerLoopHelper.AddAction(timing, result);
+                result.loopRunning = true;
+                result.calledGetResult = false;
+                result.initialFrame = -1;
 
                 token = result.core.Version;
+
+                // run immediately.
+                if (result.MoveNext())
+                {
+                    PlayerLoopHelper.AddAction(timing, result);
+                }
+                
                 return result;
             }
 
@@ -77,11 +102,15 @@ namespace Cysharp.Threading.Tasks
             {
                 try
                 {
+                    calledGetResult = true;
                     core.GetResult(token);
                 }
                 finally
                 {
-                    TryReturn();
+                    if (!loopRunning)
+                    {
+                        TryReturn();
+                    }
                 }
             }
 
@@ -102,12 +131,38 @@ namespace Cysharp.Threading.Tasks
 
             public bool MoveNext()
             {
+                if (calledGetResult)
+                {
+                    loopRunning = false;
+                    TryReturn();
+                    return false;
+                }
+
+                if (innerEnumerator == null) // invalid status, returned but loop running?
+                {
+                    return false;
+                }
+
                 if (cancellationToken.IsCancellationRequested)
                 {
+                    loopRunning = false;
                     core.TrySetCanceled(cancellationToken);
                     return false;
                 }
 
+                if (initialFrame == -1)
+                {
+                    // Time can not touch in threadpool.
+                    if (PlayerLoopHelper.IsMainThread)
+                    {
+                        initialFrame = Time.frameCount;
+                    }
+                }
+                else if (initialFrame == Time.frameCount)
+                {
+                    return true; // already executed in first frame, skip.
+                }
+
                 try
                 {
                     if (innerEnumerator.MoveNext())
@@ -117,10 +172,12 @@ namespace Cysharp.Threading.Tasks
                 }
                 catch (Exception ex)
                 {
+                    loopRunning = false;
                     core.TrySetException(ex);
                     return false;
                 }
 
+                loopRunning = false;
                 core.TrySetResult(null);
                 return false;
             }
@@ -131,6 +188,7 @@ namespace Cysharp.Threading.Tasks
                 core.Reset();
                 innerEnumerator = default;
                 cancellationToken = default;
+
                 return pool.TryPush(this);
             }
 
@@ -145,11 +203,10 @@ namespace Cysharp.Threading.Tasks
                     {
                         yield return null;
                     }
-                    else if (current is CustomYieldInstruction)
+                    else if (current is CustomYieldInstruction cyi)
                     {
                         // WWW, WaitForSecondsRealtime
-                        var e2 = UnwrapWaitCustomYieldInstruction((CustomYieldInstruction)current);
-                        while (e2.MoveNext())
+                        while (cyi.keepWaiting)
                         {
                             yield return null;
                         }
@@ -175,7 +232,7 @@ namespace Cysharp.Threading.Tasks
                         }
                         else
                         {
-                            yield return null;
+                            goto WARN;
                         }
                     }
                     else if (current is IEnumerator e3)
@@ -188,17 +245,14 @@ namespace Cysharp.Threading.Tasks
                     }
                     else
                     {
-                        // WaitForEndOfFrame, WaitForFixedUpdate, others.
-                        yield return null;
+                        goto WARN;
                     }
-                }
-            }
 
-            // WWW and others as CustomYieldInstruction.
-            static IEnumerator UnwrapWaitCustomYieldInstruction(CustomYieldInstruction yieldInstruction)
-            {
-                while (yieldInstruction.keepWaiting)
-                {
+                    continue;
+
+                    WARN:
+                    // WaitForEndOfFrame, WaitForFixedUpdate, others.
+                    UnityEngine.Debug.LogWarning($"yield {current.GetType().Name} is not supported on await IEnumerator or IEnumerator.ToUniTask(), please use ToUniTask(MonoBehaviour coroutineRunner) instead.");
                     yield return null;
                 }
             }
@@ -208,12 +262,12 @@ namespace Cysharp.Threading.Tasks
             static IEnumerator UnwrapWaitForSeconds(WaitForSeconds waitForSeconds)
             {
                 var second = (float)waitForSeconds_Seconds.GetValue(waitForSeconds);
-                var startTime = DateTimeOffset.UtcNow;
+                var elapsed = 0.0f;
                 while (true)
                 {
                     yield return null;
 
-                    var elapsed = (DateTimeOffset.UtcNow - startTime).TotalSeconds;
+                    elapsed += Time.deltaTime;
                     if (elapsed >= second)
                     {
                         break;
@@ -230,5 +284,4 @@ namespace Cysharp.Threading.Tasks
             }
         }
     }
-}
-
+}

src/UniTask/Assets/Plugins/UniTask/Runtime/External/Addressables/AddressablesAsyncExtensions.cs

@@ -13,31 +13,28 @@ namespace Cysharp.Threading.Tasks
 {
     public static class AddressablesAsyncExtensions
     {
-        #region AsyncOperationHandle
+#region AsyncOperationHandle
 
-        public static AsyncOperationHandleAwaiter GetAwaiter(this AsyncOperationHandle handle)
+        public static UniTask.Awaiter GetAwaiter(this AsyncOperationHandle handle)
         {
-            return new AsyncOperationHandleAwaiter(handle);
+            return ToUniTask(handle).GetAwaiter();
         }
 
         public static UniTask WithCancellation(this AsyncOperationHandle handle, CancellationToken cancellationToken)
         {
-            if (cancellationToken.IsCancellationRequested) return UniTask.FromCanceled(cancellationToken);
-            if (handle.IsDone)
-            {
-                if (handle.Status == AsyncOperationStatus.Failed)
-                {
-                    return UniTask.FromException(handle.OperationException);
-                }
-                return UniTask.CompletedTask;
-            }
-
-            return new UniTask(AsyncOperationHandleWithCancellationSource.Create(handle, cancellationToken, out var token), token);
+            return ToUniTask(handle, cancellationToken: cancellationToken);
         }
 
         public static UniTask ToUniTask(this AsyncOperationHandle handle, IProgress<float> progress = null, PlayerLoopTiming timing = PlayerLoopTiming.Update, CancellationToken cancellationToken = default(CancellationToken))
         {
             if (cancellationToken.IsCancellationRequested) return UniTask.FromCanceled(cancellationToken);
+
+            if (!handle.IsValid())
+            {
+                // autoReleaseHandle:true handle is invalid(immediately internal handle == null) so return completed.
+                return UniTask.CompletedTask;
+            }
+
             if (handle.IsDone)
             {
                 if (handle.Status == AsyncOperationStatus.Failed)
@@ -95,29 +92,31 @@ namespace Cysharp.Threading.Tasks
             }
         }
 
-        sealed class AsyncOperationHandleWithCancellationSource : IUniTaskSource, IPlayerLoopItem, ITaskPoolNode<AsyncOperationHandleWithCancellationSource>
+        sealed class AsyncOperationHandleConfiguredSource : IUniTaskSource, IPlayerLoopItem, ITaskPoolNode<AsyncOperationHandleConfiguredSource>
         {
-            static TaskPool<AsyncOperationHandleWithCancellationSource> pool;
-            public AsyncOperationHandleWithCancellationSource NextNode { get; set; }
+            static TaskPool<AsyncOperationHandleConfiguredSource> pool;
+            AsyncOperationHandleConfiguredSource nextNode;
+            public ref AsyncOperationHandleConfiguredSource NextNode => ref nextNode;
 
-            static AsyncOperationHandleWithCancellationSource()
+            static AsyncOperationHandleConfiguredSource()
             {
-                TaskPool.RegisterSizeGetter(typeof(AsyncOperationHandleWithCancellationSource), () => pool.Size);
+                TaskPool.RegisterSizeGetter(typeof(AsyncOperationHandleConfiguredSource), () => pool.Size);
             }
 
             readonly Action<AsyncOperationHandle> continuationAction;
             AsyncOperationHandle handle;
             CancellationToken cancellationToken;
+            IProgress<float> progress;
             bool completed;
 
             UniTaskCompletionSourceCore<AsyncUnit> core;
 
-            AsyncOperationHandleWithCancellationSource()
+            AsyncOperationHandleConfiguredSource()
             {
                 continuationAction = Continuation;
             }
 
-            public static IUniTaskSource Create(AsyncOperationHandle handle, CancellationToken cancellationToken, out short token)
+            public static IUniTaskSource Create(AsyncOperationHandle handle, PlayerLoopTiming timing, IProgress<float> progress, CancellationToken cancellationToken, out short token)
             {
                 if (cancellationToken.IsCancellationRequested)
                 {
@@ -126,16 +125,17 @@ namespace Cysharp.Threading.Tasks
 
                 if (!pool.TryPop(out var result))
                 {
-                    result = new AsyncOperationHandleWithCancellationSource();
+                    result = new AsyncOperationHandleConfiguredSource();
                 }
 
                 result.handle = handle;
+                result.progress = progress;
                 result.cancellationToken = cancellationToken;
                 result.completed = false;
 
                 TaskTracker.TrackActiveTask(result, 3);
 
-                PlayerLoopHelper.AddAction(PlayerLoopTiming.Update, result);
+                PlayerLoopHelper.AddAction(timing, result);
 
                 handle.Completed += result.continuationAction;
 
@@ -204,125 +204,18 @@ namespace Cysharp.Threading.Tasks
                     return false;
                 }
 
-                return true;
-            }
-
-            bool TryReturn()
-            {
-                TaskTracker.RemoveTracking(this);
-                core.Reset();
-                handle = default;
-                cancellationToken = default;
-                return pool.TryPush(this);
-            }
-        }
-
-        sealed class AsyncOperationHandleConfiguredSource : IUniTaskSource, IPlayerLoopItem, ITaskPoolNode<AsyncOperationHandleConfiguredSource>
-        {
-            static TaskPool<AsyncOperationHandleConfiguredSource> pool;
-            public AsyncOperationHandleConfiguredSource NextNode { get; set; }
-
-            static AsyncOperationHandleConfiguredSource()
-            {
-                TaskPool.RegisterSizeGetter(typeof(AsyncOperationHandleConfiguredSource), () => pool.Size);
-            }
-
-            AsyncOperationHandle handle;
-            IProgress<float> progress;
-            CancellationToken cancellationToken;
-
-            UniTaskCompletionSourceCore<AsyncUnit> core;
-
-            AsyncOperationHandleConfiguredSource()
-            {
-
-            }
-
-            public static IUniTaskSource Create(AsyncOperationHandle handle, PlayerLoopTiming timing, IProgress<float> progress, CancellationToken cancellationToken, out short token)
-            {
-                if (cancellationToken.IsCancellationRequested)
-                {
-                    return AutoResetUniTaskCompletionSource.CreateFromCanceled(cancellationToken, out token);
-                }
-
-                if (!pool.TryPop(out var result))
-                {
-                    result = new AsyncOperationHandleConfiguredSource();
-                }
-
-                result.handle = handle;
-                result.progress = progress;
-                result.cancellationToken = cancellationToken;
-
-                TaskTracker.TrackActiveTask(result, 3);
-
-                PlayerLoopHelper.AddAction(timing, result);
-
-                token = result.core.Version;
-                return result;
-            }
-
-            public void GetResult(short token)
-            {
-                try
-                {
-
-                    core.GetResult(token);
-                }
-                finally
-                {
-                    TryReturn();
-                }
-            }
-
-            public UniTaskStatus GetStatus(short token)
-            {
-                return core.GetStatus(token);
-            }
-
-            public UniTaskStatus UnsafeGetStatus()
-            {
-                return core.UnsafeGetStatus();
-            }
-
-            public void OnCompleted(Action<object> continuation, object state, short token)
-            {
-                core.OnCompleted(continuation, state, token);
-            }
-
-            public bool MoveNext()
-            {
-                if (cancellationToken.IsCancellationRequested)
-                {
-                    core.TrySetCanceled(cancellationToken);
-                    return false;
-                }
-
-                if (progress != null)
+                if (progress != null && handle.IsValid())
                 {
                     progress.Report(handle.PercentComplete);
                 }
 
-                if (handle.IsDone)
-                {
-                    if (handle.Status == AsyncOperationStatus.Failed)
-                    {
-                        core.TrySetException(handle.OperationException);
-                    }
-                    else
-                    {
-                        core.TrySetResult(AsyncUnit.Default);
-                    }
-                    return false;
-                }
-
                 return true;
             }
 
             bool TryReturn()
             {
-                core.Reset();
                 TaskTracker.RemoveTracking(this);
+                core.Reset();
                 handle = default;
                 progress = default;
                 cancellationToken = default;
@@ -330,32 +223,29 @@ namespace Cysharp.Threading.Tasks
             }
         }
 
-        #endregion
+#endregion
 
-        #region AsyncOperationHandle_T
+#region AsyncOperationHandle_T
 
-        public static AsyncOperationHandleAwaiter<T> GetAwaiter<T>(this AsyncOperationHandle<T> handle)
+        public static UniTask<T>.Awaiter GetAwaiter<T>(this AsyncOperationHandle<T> handle)
         {
-            return new AsyncOperationHandleAwaiter<T>(handle);
+            return ToUniTask(handle).GetAwaiter();
         }
 
         public static UniTask<T> WithCancellation<T>(this AsyncOperationHandle<T> handle, CancellationToken cancellationToken)
         {
-            if (cancellationToken.IsCancellationRequested) return UniTask.FromCanceled<T>(cancellationToken);
-            if (handle.IsDone)
-            {
-                if (handle.Status == AsyncOperationStatus.Failed)
-                {
-                    return UniTask.FromException<T>(handle.OperationException);
-                }
-                return UniTask.FromResult(handle.Result);
-            }
-            return new UniTask<T>(AsyncOperationHandleWithCancellationSource<T>.Create(handle, cancellationToken, out var token), token);
+            return ToUniTask(handle, cancellationToken: cancellationToken);
         }
 
         public static UniTask<T> ToUniTask<T>(this AsyncOperationHandle<T> handle, IProgress<float> progress = null, PlayerLoopTiming timing = PlayerLoopTiming.Update, CancellationToken cancellationToken = default(CancellationToken))
         {
             if (cancellationToken.IsCancellationRequested) return UniTask.FromCanceled<T>(cancellationToken);
+
+            if (!handle.IsValid())
+            {
+                throw new Exception("Attempting to use an invalid operation handle");
+            }
+
             if (handle.IsDone)
             {
                 if (handle.Status == AsyncOperationStatus.Failed)
@@ -368,75 +258,31 @@ namespace Cysharp.Threading.Tasks
             return new UniTask<T>(AsyncOperationHandleConfiguredSource<T>.Create(handle, timing, progress, cancellationToken, out var token), token);
         }
 
-        public struct AsyncOperationHandleAwaiter<T> : ICriticalNotifyCompletion
+        sealed class AsyncOperationHandleConfiguredSource<T> : IUniTaskSource<T>, IPlayerLoopItem, ITaskPoolNode<AsyncOperationHandleConfiguredSource<T>>
         {
-            AsyncOperationHandle<T> handle;
-            Action<AsyncOperationHandle> continuationAction;
+            static TaskPool<AsyncOperationHandleConfiguredSource<T>> pool;
+            AsyncOperationHandleConfiguredSource<T> nextNode;
+            public ref AsyncOperationHandleConfiguredSource<T> NextNode => ref nextNode;
 
-            public AsyncOperationHandleAwaiter(AsyncOperationHandle<T> handle)
+            static AsyncOperationHandleConfiguredSource()
             {
-                this.handle = handle;
-                this.continuationAction = null;
-            }
-
-            public bool IsCompleted => handle.IsDone;
-
-            public T GetResult()
-            {
-                if (continuationAction != null)
-                {
-                    handle.CompletedTypeless -= continuationAction;
-                    continuationAction = null;
-                }
-
-                if (handle.Status == AsyncOperationStatus.Failed)
-                {
-                    var e = handle.OperationException;
-                    handle = default;
-                    ExceptionDispatchInfo.Capture(e).Throw();
-                }
-
-                var result = handle.Result;
-                handle = default;
-                return result;
-            }
-
-            public void OnCompleted(Action continuation)
-            {
-                UnsafeOnCompleted(continuation);
-            }
-
-            public void UnsafeOnCompleted(Action continuation)
-            {
-                Error.ThrowWhenContinuationIsAlreadyRegistered(continuationAction);
-                continuationAction = PooledDelegate<AsyncOperationHandle>.Create(continuation);
-                handle.CompletedTypeless += continuationAction;
-            }
-        }
-
-        sealed class AsyncOperationHandleWithCancellationSource<T> : IUniTaskSource<T>, IPlayerLoopItem, ITaskPoolNode<AsyncOperationHandleWithCancellationSource<T>>
-        {
-            static TaskPool<AsyncOperationHandleWithCancellationSource<T>> pool;
-            public AsyncOperationHandleWithCancellationSource<T> NextNode { get; set; }
-
-            static AsyncOperationHandleWithCancellationSource()
-            {
-                TaskPool.RegisterSizeGetter(typeof(AsyncOperationHandleWithCancellationSource<T>), () => pool.Size);
+                TaskPool.RegisterSizeGetter(typeof(AsyncOperationHandleConfiguredSource<T>), () => pool.Size);
             }
 
             readonly Action<AsyncOperationHandle<T>> continuationAction;
             AsyncOperationHandle<T> handle;
             CancellationToken cancellationToken;
+            IProgress<float> progress;
             bool completed;
 
             UniTaskCompletionSourceCore<T> core;
 
-            AsyncOperationHandleWithCancellationSource()
+            AsyncOperationHandleConfiguredSource()
             {
                 continuationAction = Continuation;
             }
 
-            public static IUniTaskSource<T> Create(AsyncOperationHandle<T> handle, CancellationToken cancellationToken, out short token)
+            public static IUniTaskSource<T> Create(AsyncOperationHandle<T> handle, PlayerLoopTiming timing, IProgress<float> progress, CancellationToken cancellationToken, out short token)
             {
                 if (cancellationToken.IsCancellationRequested)
                 {
@@ -445,16 +291,17 @@ namespace Cysharp.Threading.Tasks
 
                 if (!pool.TryPop(out var result))
                 {
-                    result = new AsyncOperationHandleWithCancellationSource<T>();
+                    result = new AsyncOperationHandleConfiguredSource<T>();
                 }
 
                 result.handle = handle;
                 result.cancellationToken = cancellationToken;
                 result.completed = false;
+                result.progress = progress;
 
                 TaskTracker.TrackActiveTask(result, 3);
 
-                PlayerLoopHelper.AddAction(PlayerLoopTiming.Update, result);
+                PlayerLoopHelper.AddAction(timing, result);
 
                 handle.Completed += result.continuationAction;
 
@@ -462,7 +309,7 @@ namespace Cysharp.Threading.Tasks
                 return result;
             }
 
-            void Continuation(AsyncOperationHandle<T> _)
+            void Continuation(AsyncOperationHandle<T> argHandle)
             {
                 handle.Completed -= continuationAction;
 
@@ -477,13 +324,13 @@ namespace Cysharp.Threading.Tasks
                     {
                         core.TrySetCanceled(cancellationToken);
                     }
-                    else if (handle.Status == AsyncOperationStatus.Failed)
+                    else if (argHandle.Status == AsyncOperationStatus.Failed)
                     {
-                        core.TrySetException(handle.OperationException);
+                        core.TrySetException(argHandle.OperationException);
                     }
                     else
                     {
-                        core.TrySetResult(handle.Result);
+                        core.TrySetResult(argHandle.Result);
                     }
                 }
             }
@@ -528,122 +375,11 @@ namespace Cysharp.Threading.Tasks
                     return false;
                 }
 
-                return true;
-            }
-
-            bool TryReturn()
-            {
-                TaskTracker.RemoveTracking(this);
-                core.Reset();
-                handle = default;
-                cancellationToken = default;
-                return pool.TryPush(this);
-            }
-        }
-
-        sealed class AsyncOperationHandleConfiguredSource<T> : IUniTaskSource<T>, IPlayerLoopItem, ITaskPoolNode<AsyncOperationHandleConfiguredSource<T>>
-        {
-            static TaskPool<AsyncOperationHandleConfiguredSource<T>> pool;
-            public AsyncOperationHandleConfiguredSource<T> NextNode { get; set; }
-
-            static AsyncOperationHandleConfiguredSource()
-            {
-                TaskPool.RegisterSizeGetter(typeof(AsyncOperationHandleConfiguredSource<T>), () => pool.Size);
-            }
-
-            AsyncOperationHandle<T> handle;
-            IProgress<float> progress;
-            CancellationToken cancellationToken;
-
-            UniTaskCompletionSourceCore<T> core;
-
-            AsyncOperationHandleConfiguredSource()
-            {
-
-            }
-
-            public static IUniTaskSource<T> Create(AsyncOperationHandle<T> handle, PlayerLoopTiming timing, IProgress<float> progress, CancellationToken cancellationToken, out short token)
-            {
-                if (cancellationToken.IsCancellationRequested)
-                {
-                    return AutoResetUniTaskCompletionSource<T>.CreateFromCanceled(cancellationToken, out token);
-                }
-
-                if (!pool.TryPop(out var result))
-                {
-                    result = new AsyncOperationHandleConfiguredSource<T>();
-                }
-
-                result.handle = handle;
-                result.progress = progress;
-                result.cancellationToken = cancellationToken;
-
-                TaskTracker.TrackActiveTask(result, 3);
-
-                PlayerLoopHelper.AddAction(timing, result);
-
-                token = result.core.Version;
-                return result;
-            }
-
-            public T GetResult(short token)
-            {
-                try
-                {
-                    return core.GetResult(token);
-                }
-                finally
-                {
-                    TryReturn();
-                }
-            }
-
-            void IUniTaskSource.GetResult(short token)
-            {
-                GetResult(token);
-            }
-
-            public UniTaskStatus GetStatus(short token)
-            {
-                return core.GetStatus(token);
-            }
-
-            public UniTaskStatus UnsafeGetStatus()
-            {
-                return core.UnsafeGetStatus();
-            }
-
-            public void OnCompleted(Action<object> continuation, object state, short token)
-            {
-                core.OnCompleted(continuation, state, token);
-            }
-
-            public bool MoveNext()
-            {
-                if (cancellationToken.IsCancellationRequested)
-                {
-                    core.TrySetCanceled(cancellationToken);
-                    return false;
-                }
-
-                if (progress != null)
+                if (progress != null && handle.IsValid())
                 {
                     progress.Report(handle.PercentComplete);
                 }
 
-                if (handle.IsDone)
-                {
-                    if (handle.Status == AsyncOperationStatus.Failed)
-                    {
-                        core.TrySetException(handle.OperationException);
-                    }
-                    else
-                    {
-                        core.TrySetResult(handle.Result);
-                    }
-                    return false;
-                }
-
                 return true;
             }
 
@@ -658,7 +394,7 @@ namespace Cysharp.Threading.Tasks
             }
         }
 
-        #endregion
+#endregion
     }
 }
 

src/UniTask/Assets/Plugins/UniTask/Runtime/External/DOTween/DOTweenAsyncExtensions.cs

@@ -11,7 +11,6 @@ using System.Threading;
 
 namespace Cysharp.Threading.Tasks
 {
-    // The idea of TweenCancelBehaviour is borrowed from https://www.shibuya24.info/entry/dotween_async_await
     public enum TweenCancelBehaviour
     {
         Kill,
@@ -29,6 +28,16 @@ namespace Cysharp.Threading.Tasks
 
     public static class DOTweenAsyncExtensions
     {
+        enum CallbackType
+        {
+            Kill,
+            Complete,
+            Pause,
+            Play,
+            Rewind,
+            StepComplete
+        }
+
         public static TweenAwaiter GetAwaiter(this Tween tween)
         {
             return new TweenAwaiter(tween);
@@ -39,7 +48,7 @@ namespace Cysharp.Threading.Tasks
             Error.ThrowArgumentNullException(tween, nameof(tween));
 
             if (!tween.IsActive()) return UniTask.CompletedTask;
-            return new UniTask(TweenConfiguredSource.Create(tween, TweenCancelBehaviour.Kill, cancellationToken, out var token), token);
+            return new UniTask(TweenConfiguredSource.Create(tween, TweenCancelBehaviour.Kill, cancellationToken, CallbackType.Kill, out var token), token);
         }
 
         public static UniTask ToUniTask(this Tween tween, TweenCancelBehaviour tweenCancelBehaviour = TweenCancelBehaviour.Kill, CancellationToken cancellationToken = default)
@@ -47,7 +56,47 @@ namespace Cysharp.Threading.Tasks
             Error.ThrowArgumentNullException(tween, nameof(tween));
 
             if (!tween.IsActive()) return UniTask.CompletedTask;
-            return new UniTask(TweenConfiguredSource.Create(tween, tweenCancelBehaviour, cancellationToken, out var token), token);
+            return new UniTask(TweenConfiguredSource.Create(tween, tweenCancelBehaviour, cancellationToken, CallbackType.Kill, out var token), token);
+        }
+
+        public static UniTask AwaitForComplete(this Tween tween, TweenCancelBehaviour tweenCancelBehaviour = TweenCancelBehaviour.Kill, CancellationToken cancellationToken = default)
+        {
+            Error.ThrowArgumentNullException(tween, nameof(tween));
+
+            if (!tween.IsActive()) return UniTask.CompletedTask;
+            return new UniTask(TweenConfiguredSource.Create(tween, tweenCancelBehaviour, cancellationToken, CallbackType.Complete, out var token), token);
+        }
+
+        public static UniTask AwaitForPause(this Tween tween, TweenCancelBehaviour tweenCancelBehaviour = TweenCancelBehaviour.Kill, CancellationToken cancellationToken = default)
+        {
+            Error.ThrowArgumentNullException(tween, nameof(tween));
+
+            if (!tween.IsActive()) return UniTask.CompletedTask;
+            return new UniTask(TweenConfiguredSource.Create(tween, tweenCancelBehaviour, cancellationToken, CallbackType.Pause, out var token), token);
+        }
+
+        public static UniTask AwaitForPlay(this Tween tween, TweenCancelBehaviour tweenCancelBehaviour = TweenCancelBehaviour.Kill, CancellationToken cancellationToken = default)
+        {
+            Error.ThrowArgumentNullException(tween, nameof(tween));
+
+            if (!tween.IsActive()) return UniTask.CompletedTask;
+            return new UniTask(TweenConfiguredSource.Create(tween, tweenCancelBehaviour, cancellationToken, CallbackType.Play, out var token), token);
+        }
+
+        public static UniTask AwaitForRewind(this Tween tween, TweenCancelBehaviour tweenCancelBehaviour = TweenCancelBehaviour.Kill, CancellationToken cancellationToken = default)
+        {
+            Error.ThrowArgumentNullException(tween, nameof(tween));
+
+            if (!tween.IsActive()) return UniTask.CompletedTask;
+            return new UniTask(TweenConfiguredSource.Create(tween, tweenCancelBehaviour, cancellationToken, CallbackType.Rewind, out var token), token);
+        }
+
+        public static UniTask AwaitForStepComplete(this Tween tween, TweenCancelBehaviour tweenCancelBehaviour = TweenCancelBehaviour.Kill, CancellationToken cancellationToken = default)
+        {
+            Error.ThrowArgumentNullException(tween, nameof(tween));
+
+            if (!tween.IsActive()) return UniTask.CompletedTask;
+            return new UniTask(TweenConfiguredSource.Create(tween, tweenCancelBehaviour, cancellationToken, CallbackType.StepComplete, out var token), token);
         }
 
         public struct TweenAwaiter : ICriticalNotifyCompletion
@@ -86,7 +135,8 @@ namespace Cysharp.Threading.Tasks
         sealed class TweenConfiguredSource : IUniTaskSource, ITaskPoolNode<TweenConfiguredSource>
         {
             static TaskPool<TweenConfiguredSource> pool;
-            public TweenConfiguredSource NextNode { get; set; }
+            TweenConfiguredSource nextNode;
+            public ref TweenConfiguredSource NextNode => ref nextNode;
 
             static TweenConfiguredSource()
             {
@@ -95,12 +145,13 @@ namespace Cysharp.Threading.Tasks
 
             static readonly TweenCallback EmptyTweenCallback = () => { };
 
-            readonly TweenCallback onKillDelegate;
+            readonly TweenCallback onCompleteCallbackDelegate;
             readonly TweenCallback onUpdateDelegate;
 
             Tween tween;
             TweenCancelBehaviour cancelBehaviour;
             CancellationToken cancellationToken;
+            CallbackType callbackType;
             bool canceled;
 
             TweenCallback originalUpdateAction;
@@ -108,11 +159,11 @@ namespace Cysharp.Threading.Tasks
 
             TweenConfiguredSource()
             {
-                onKillDelegate = OnKill;
+                onCompleteCallbackDelegate = OnCompleteCallbackDelegate;
                 onUpdateDelegate = OnUpdate;
             }
 
-            public static IUniTaskSource Create(Tween tween, TweenCancelBehaviour cancelBehaviour, CancellationToken cancellationToken, out short token)
+            public static IUniTaskSource Create(Tween tween, TweenCancelBehaviour cancelBehaviour, CancellationToken cancellationToken, CallbackType callbackType, out short token)
             {
                 if (cancellationToken.IsCancellationRequested)
                 {
@@ -128,6 +179,7 @@ namespace Cysharp.Threading.Tasks
                 result.tween = tween;
                 result.cancelBehaviour = cancelBehaviour;
                 result.cancellationToken = cancellationToken;
+                result.callbackType = callbackType;
 
                 result.originalUpdateAction = tween.onUpdate;
                 result.canceled = false;
@@ -138,7 +190,30 @@ namespace Cysharp.Threading.Tasks
                 }
 
                 tween.onUpdate = result.onUpdateDelegate;
-                tween.onKill = result.onKillDelegate;
+
+                switch (callbackType)
+                {
+                    case CallbackType.Kill:
+                        tween.onKill = result.onCompleteCallbackDelegate;
+                        break;
+                    case CallbackType.Complete:
+                        tween.onComplete = result.onCompleteCallbackDelegate;
+                        break;
+                    case CallbackType.Pause:
+                        tween.onPause = result.onCompleteCallbackDelegate;
+                        break;
+                    case CallbackType.Play:
+                        tween.onPlay = result.onCompleteCallbackDelegate;
+                        break;
+                    case CallbackType.Rewind:
+                        tween.onRewind = result.onCompleteCallbackDelegate;
+                        break;
+                    case CallbackType.StepComplete:
+                        tween.onStepComplete = result.onCompleteCallbackDelegate;
+                        break;
+                    default:
+                        break;
+                }
 
                 TaskTracker.TrackActiveTask(result, 3);
 
@@ -146,8 +221,19 @@ namespace Cysharp.Threading.Tasks
                 return result;
             }
 
-            void OnKill()
+            void OnCompleteCallbackDelegate()
             {
+                if (cancellationToken.IsCancellationRequested)
+                {
+                    if (this.cancelBehaviour == TweenCancelBehaviour.KillAndCancelAwait
+                        || this.cancelBehaviour == TweenCancelBehaviour.KillWithCompleteCallbackAndCancelAwait
+                        || this.cancelBehaviour == TweenCancelBehaviour.CompleteAndCancelAwait
+                        || this.cancelBehaviour == TweenCancelBehaviour.CompleteWithSeqeunceCallbackAndCancelAwait
+                        || this.cancelBehaviour == TweenCancelBehaviour.CancelAwait)
+                    {
+                        canceled = true;
+                    }
+                }
                 if (canceled)
                 {
                     core.TrySetCanceled(cancellationToken);
@@ -199,7 +285,31 @@ namespace Cysharp.Threading.Tasks
                         this.tween.Complete(true);
                         break;
                     case TweenCancelBehaviour.CancelAwait:
-                        this.tween.onKill = EmptyTweenCallback; // replace to empty(avoid callback after Canceled(instance is returned to pool.)
+                        // replace to empty(avoid callback after Canceled(instance is returned to pool.)
+                        switch (callbackType)
+                        {
+                            case CallbackType.Kill:
+                                tween.onKill = EmptyTweenCallback;
+                                break;
+                            case CallbackType.Complete:
+                                tween.onComplete = EmptyTweenCallback;
+                                break;
+                            case CallbackType.Pause:
+                                tween.onPause = EmptyTweenCallback;
+                                break;
+                            case CallbackType.Play:
+                                tween.onPlay = EmptyTweenCallback;
+                                break;
+                            case CallbackType.Rewind:
+                                tween.onRewind = EmptyTweenCallback;
+                                break;
+                            case CallbackType.StepComplete:
+                                tween.onStepComplete = EmptyTweenCallback;
+                                break;
+                            default:
+                                break;
+                        }
+
                         this.core.TrySetCanceled(this.cancellationToken);
                         break;
                 }
@@ -272,7 +382,31 @@ namespace Cysharp.Threading.Tasks
                 TaskTracker.RemoveTracking(this);
                 core.Reset();
                 tween.onUpdate = originalUpdateAction;
-                tween.onKill = null;
+
+                switch (callbackType)
+                {
+                    case CallbackType.Kill:
+                        tween.onKill = null;
+                        break;
+                    case CallbackType.Complete:
+                        tween.onComplete = null;
+                        break;
+                    case CallbackType.Pause:
+                        tween.onPause = null;
+                        break;
+                    case CallbackType.Play:
+                        tween.onPlay = null;
+                        break;
+                    case CallbackType.Rewind:
+                        tween.onRewind = null;
+                        break;
+                    case CallbackType.StepComplete:
+                        tween.onStepComplete = null;
+                        break;
+                    default:
+                        break;
+                }
+
                 tween = default;
                 cancellationToken = default;
                 originalUpdateAction = default;

src/UniTask/Assets/Plugins/UniTask/Runtime/External/TextMeshPro/TextMeshProAsyncExtensions.cs

@@ -9,6 +9,7 @@ namespace Cysharp.Threading.Tasks
 {
     public static partial class TextMeshProAsyncExtensions
     {
+        // <string> -> Text
         public static void BindTo(this IUniTaskAsyncEnumerable<string> source, TMP_Text text, bool rebindOnError = true)
         {
             BindToCore(source, text, text.GetCancellationTokenOnDestroy(), rebindOnError).Forget();
@@ -62,6 +63,67 @@ namespace Cysharp.Threading.Tasks
                 }
             }
         }
+
+        // <T> -> Text
+
+        public static void BindTo<T>(this IUniTaskAsyncEnumerable<T> source, TMP_Text text, bool rebindOnError = true)
+        {
+            BindToCore(source, text, text.GetCancellationTokenOnDestroy(), rebindOnError).Forget();
+        }
+
+        public static void BindTo<T>(this IUniTaskAsyncEnumerable<T> source, TMP_Text text, CancellationToken cancellationToken, bool rebindOnError = true)
+        {
+            BindToCore(source, text, cancellationToken, rebindOnError).Forget();
+        }
+
+        public static void BindTo<T>(this AsyncReactiveProperty<T> source, TMP_Text text, bool rebindOnError = true)
+        {
+            BindToCore(source, text, text.GetCancellationTokenOnDestroy(), rebindOnError).Forget();
+        }
+
+        static async UniTaskVoid BindToCore<T>(IUniTaskAsyncEnumerable<T> source, TMP_Text text, CancellationToken cancellationToken, bool rebindOnError)
+        {
+            var repeat = false;
+            BIND_AGAIN:
+            var e = source.GetAsyncEnumerator(cancellationToken);
+            try
+            {
+                while (true)
+                {
+                    bool moveNext;
+                    try
+                    {
+                        moveNext = await e.MoveNextAsync();
+                        repeat = false;
+                    }
+                    catch (Exception ex)
+                    {
+                        if (ex is OperationCanceledException) return;
+
+                        if (rebindOnError && !repeat)
+                        {
+                            repeat = true;
+                            goto BIND_AGAIN;
+                        }
+                        else
+                        {
+                            throw;
+                        }
+                    }
+
+                    if (!moveNext) return;
+
+                    text.text = e.Current.ToString();
+                }
+            }
+            finally
+            {
+                if (e != null)
+                {
+                    await e.DisposeAsync();
+                }
+            }
+        }
     }
 }
 

src/UniTask/Assets/Plugins/UniTask/Runtime/Internal/ContinuationQueue.cs

@@ -12,7 +12,7 @@ namespace Cysharp.Threading.Tasks.Internal
 
         readonly PlayerLoopTiming timing;
 
-        SpinLock gate = new SpinLock();
+        SpinLock gate = new SpinLock(false);
         bool dequing = false;
 
         int actionListCount = 0;
@@ -70,13 +70,17 @@ namespace Cysharp.Threading.Tasks.Internal
             }
         }
 
-        public void Clear()
+        public int Clear()
         {
+            var rest = actionListCount + waitingListCount;
+
             actionListCount = 0;
             actionList = new Action[InitialSize];
 
             waitingListCount = 0;
             waitingList = new Action[InitialSize];
+
+            return rest;
         }
 
         // delegate entrypoint.
@@ -128,6 +132,14 @@ namespace Cysharp.Threading.Tasks.Internal
                 case PlayerLoopTiming.LastPostLateUpdate:
                     LastPostLateUpdate();
                     break;
+#if UNITY_2020_2_OR_NEWER
+                case PlayerLoopTiming.TimeUpdate:
+                    TimeUpdate();
+                    break;
+                case PlayerLoopTiming.LastTimeUpdate:
+                    LastTimeUpdate();
+                    break;
+#endif
                 default:
                     break;
             }
@@ -150,6 +162,10 @@ namespace Cysharp.Threading.Tasks.Internal
         void LastPreLateUpdate() => RunCore();
         void PostLateUpdate() => RunCore();
         void LastPostLateUpdate() => RunCore();
+#if UNITY_2020_2_OR_NEWER
+        void TimeUpdate() => RunCore();
+        void LastTimeUpdate() => RunCore();
+#endif
 
         [System.Diagnostics.DebuggerHidden]
         void RunCore()
@@ -170,9 +186,9 @@ namespace Cysharp.Threading.Tasks.Internal
 
             for (int i = 0; i < actionListCount; i++)
             {
+
                 var action = actionList[i];
                 actionList[i] = null;
-
                 try
                 {
                     action();

src/UniTask/Assets/Plugins/UniTask/Runtime/Internal/PlayerLoopRunner.cs

@@ -48,14 +48,24 @@ namespace Cysharp.Threading.Tasks.Internal
             }
         }
 
-        public void Clear()
+        public int Clear()
         {
             lock (arrayLock)
             {
+                var rest = 0;
+
                 for (var index = 0; index < loopItems.Length; index++)
                 {
+                    if (loopItems[index] != null)
+                    {
+                        rest++;
+                    }
+
                     loopItems[index] = null;
                 }
+
+                tail = 0;
+                return rest;
             }
         }
 
@@ -108,6 +118,14 @@ namespace Cysharp.Threading.Tasks.Internal
                 case PlayerLoopTiming.LastPostLateUpdate:
                     LastPostLateUpdate();
                     break;
+#if UNITY_2020_2_OR_NEWER
+                case PlayerLoopTiming.TimeUpdate:
+                    TimeUpdate();
+                    break;
+                case PlayerLoopTiming.LastTimeUpdate:
+                    LastTimeUpdate();
+                    break;
+#endif
                 default:
                     break;
             }
@@ -130,6 +148,10 @@ namespace Cysharp.Threading.Tasks.Internal
         void LastPreLateUpdate() => RunCore();
         void PostLateUpdate() => RunCore();
         void LastPostLateUpdate() => RunCore();
+#if UNITY_2020_2_OR_NEWER
+        void TimeUpdate() => RunCore();
+        void LastTimeUpdate() => RunCore();
+#endif
 
         [System.Diagnostics.DebuggerHidden]
         void RunCore()
@@ -143,7 +165,6 @@ namespace Cysharp.Threading.Tasks.Internal
             {
                 var j = tail - 1;
 
-                // eliminate array-bound check for i
                 for (int i = 0; i < loopItems.Length; i++)
                 {
                     var action = loopItems[i];

src/UniTask/Assets/Plugins/UniTask/Runtime/Internal/PooledDelegate.cs

@@ -7,7 +7,8 @@ namespace Cysharp.Threading.Tasks.Internal
     {
         static TaskPool<PooledDelegate<T>> pool;
 
-        public PooledDelegate<T> NextNode { get; set; }
+        PooledDelegate<T> nextNode;
+        public ref PooledDelegate<T> NextNode => ref nextNode;
 
         static PooledDelegate()
         {

src/UniTask/Assets/Plugins/UniTask/Runtime/Internal/UnityWebRequestExtensions.cs

@@ -7,6 +7,8 @@ using UnityEngine.Networking;
 
 namespace Cysharp.Threading.Tasks.Internal
 {
+#if ENABLE_UNITYWEBREQUEST && (!UNITY_2019_1_OR_NEWER || UNITASK_WEBREQUEST_SUPPORT)
+    
     internal static class UnityWebRequestResultExtensions
     {
         public static bool IsError(this UnityWebRequest unityWebRequest)
@@ -21,4 +23,6 @@ namespace Cysharp.Threading.Tasks.Internal
 #endif
         }
     }
+
+#endif
 }

src/UniTask/Assets/Plugins/UniTask/Runtime/Internal/ValueStopwatch.cs

@@ -18,6 +18,8 @@ namespace Cysharp.Threading.Tasks.Internal
 
         public TimeSpan Elapsed => TimeSpan.FromTicks(this.ElapsedTicks);
 
+        public bool IsInvalid => startTimestamp == 0;
+
         public long ElapsedTicks
         {
             get

src/UniTask/Assets/Plugins/UniTask/Runtime/Linq/Subscribe.cs

@@ -63,6 +63,42 @@ namespace Cysharp.Threading.Tasks.Linq
             Subscribes.SubscribeCore(source, action, Subscribes.NopError, Subscribes.NopCompleted, cancellationToken).Forget();
         }
 
+        public static IDisposable SubscribeAwait<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Func<TSource, UniTask> onNext)
+        {
+            Error.ThrowArgumentNullException(source, nameof(source));
+            Error.ThrowArgumentNullException(onNext, nameof(onNext));
+
+            var cts = new CancellationTokenDisposable();
+            Subscribes.SubscribeAwaitCore(source, onNext, Subscribes.NopError, Subscribes.NopCompleted, cts.Token).Forget();
+            return cts;
+        }
+
+        public static void SubscribeAwait<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Func<TSource, UniTask> onNext, CancellationToken cancellationToken)
+        {
+            Error.ThrowArgumentNullException(source, nameof(source));
+            Error.ThrowArgumentNullException(onNext, nameof(onNext));
+
+            Subscribes.SubscribeAwaitCore(source, onNext, Subscribes.NopError, Subscribes.NopCompleted, cancellationToken).Forget();
+        }
+
+        public static IDisposable SubscribeAwait<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, UniTask> onNext)
+        {
+            Error.ThrowArgumentNullException(source, nameof(source));
+            Error.ThrowArgumentNullException(onNext, nameof(onNext));
+
+            var cts = new CancellationTokenDisposable();
+            Subscribes.SubscribeAwaitCore(source, onNext, Subscribes.NopError, Subscribes.NopCompleted, cts.Token).Forget();
+            return cts;
+        }
+
+        public static void SubscribeAwait<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, UniTask> onNext, CancellationToken cancellationToken)
+        {
+            Error.ThrowArgumentNullException(source, nameof(source));
+            Error.ThrowArgumentNullException(onNext, nameof(onNext));
+
+            Subscribes.SubscribeAwaitCore(source, onNext, Subscribes.NopError, Subscribes.NopCompleted, cancellationToken).Forget();
+        }
+
         // OnNext, OnError
 
         public static IDisposable Subscribe<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Action<TSource> onNext, Action<Exception> onError)
@@ -105,6 +141,46 @@ namespace Cysharp.Threading.Tasks.Linq
             Subscribes.SubscribeCore(source, onNext, onError, Subscribes.NopCompleted, cancellationToken).Forget();
         }
 
+        public static IDisposable SubscribeAwait<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Func<TSource, UniTask> onNext, Action<Exception> onError)
+        {
+            Error.ThrowArgumentNullException(source, nameof(source));
+            Error.ThrowArgumentNullException(onNext, nameof(onNext));
+            Error.ThrowArgumentNullException(onError, nameof(onError));
+
+            var cts = new CancellationTokenDisposable();
+            Subscribes.SubscribeAwaitCore(source, onNext, onError, Subscribes.NopCompleted, cts.Token).Forget();
+            return cts;
+        }
+
+        public static void SubscribeAwait<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Func<TSource, UniTask> onNext, Action<Exception> onError, CancellationToken cancellationToken)
+        {
+            Error.ThrowArgumentNullException(source, nameof(source));
+            Error.ThrowArgumentNullException(onNext, nameof(onNext));
+            Error.ThrowArgumentNullException(onError, nameof(onError));
+
+            Subscribes.SubscribeAwaitCore(source, onNext, onError, Subscribes.NopCompleted, cancellationToken).Forget();
+        }
+
+        public static IDisposable SubscribeAwait<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, UniTask> onNext, Action<Exception> onError)
+        {
+            Error.ThrowArgumentNullException(source, nameof(source));
+            Error.ThrowArgumentNullException(onNext, nameof(onNext));
+            Error.ThrowArgumentNullException(onError, nameof(onError));
+
+            var cts = new CancellationTokenDisposable();
+            Subscribes.SubscribeAwaitCore(source, onNext, onError, Subscribes.NopCompleted, cts.Token).Forget();
+            return cts;
+        }
+
+        public static void SubscribeAwait<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, UniTask> onNext, Action<Exception> onError, CancellationToken cancellationToken)
+        {
+            Error.ThrowArgumentNullException(source, nameof(source));
+            Error.ThrowArgumentNullException(onNext, nameof(onNext));
+            Error.ThrowArgumentNullException(onError, nameof(onError));
+
+            Subscribes.SubscribeAwaitCore(source, onNext, onError, Subscribes.NopCompleted, cancellationToken).Forget();
+        }
+
         // OnNext, OnCompleted
 
         public static IDisposable Subscribe<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Action<TSource> onNext, Action onCompleted)
@@ -147,6 +223,46 @@ namespace Cysharp.Threading.Tasks.Linq
             Subscribes.SubscribeCore(source, onNext, Subscribes.NopError, onCompleted, cancellationToken).Forget();
         }
 
+        public static IDisposable SubscribeAwait<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Func<TSource, UniTask> onNext, Action onCompleted)
+        {
+            Error.ThrowArgumentNullException(source, nameof(source));
+            Error.ThrowArgumentNullException(onNext, nameof(onNext));
+            Error.ThrowArgumentNullException(onCompleted, nameof(onCompleted));
+
+            var cts = new CancellationTokenDisposable();
+            Subscribes.SubscribeAwaitCore(source, onNext, Subscribes.NopError, onCompleted, cts.Token).Forget();
+            return cts;
+        }
+
+        public static void SubscribeAwait<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Func<TSource, UniTask> onNext, Action onCompleted, CancellationToken cancellationToken)
+        {
+            Error.ThrowArgumentNullException(source, nameof(source));
+            Error.ThrowArgumentNullException(onNext, nameof(onNext));
+            Error.ThrowArgumentNullException(onCompleted, nameof(onCompleted));
+
+            Subscribes.SubscribeAwaitCore(source, onNext, Subscribes.NopError, onCompleted, cancellationToken).Forget();
+        }
+
+        public static IDisposable SubscribeAwait<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, UniTask> onNext, Action onCompleted)
+        {
+            Error.ThrowArgumentNullException(source, nameof(source));
+            Error.ThrowArgumentNullException(onNext, nameof(onNext));
+            Error.ThrowArgumentNullException(onCompleted, nameof(onCompleted));
+
+            var cts = new CancellationTokenDisposable();
+            Subscribes.SubscribeAwaitCore(source, onNext, Subscribes.NopError, onCompleted, cts.Token).Forget();
+            return cts;
+        }
+
+        public static void SubscribeAwait<TSource>(this IUniTaskAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, UniTask> onNext, Action onCompleted, CancellationToken cancellationToken)
+        {
+            Error.ThrowArgumentNullException(source, nameof(source));
+            Error.ThrowArgumentNullException(onNext, nameof(onNext));
+            Error.ThrowArgumentNullException(onCompleted, nameof(onCompleted));
+
+            Subscribes.SubscribeAwaitCore(source, onNext, Subscribes.NopError, onCompleted, cancellationToken).Forget();
+        }
+
         // IObserver
 
         public static IDisposable Subscribe<TSource>(this IUniTaskAsyncEnumerable<TSource> source, IObserver<TSource> observer)
@@ -195,7 +311,14 @@ namespace Cysharp.Threading.Tasks.Linq
             {
                 while (await e.MoveNextAsync())
                 {
-                    onNext(e.Current);
+                    try
+                    {
+                        onNext(e.Current);
+                    }
+                    catch (Exception ex)
+                    {
+                        UniTaskScheduler.PublishUnobservedTaskException(ex);
+                    }
                 }
                 onCompleted();
             }
@@ -227,7 +350,14 @@ namespace Cysharp.Threading.Tasks.Linq
             {
                 while (await e.MoveNextAsync())
                 {
-                    onNext(e.Current).Forget();
+                    try
+                    {
+                        onNext(e.Current).Forget();
+                    }
+                    catch (Exception ex)
+                    {
+                        UniTaskScheduler.PublishUnobservedTaskException(ex);
+                    }
                 }
                 onCompleted();
             }
@@ -259,7 +389,14 @@ namespace Cysharp.Threading.Tasks.Linq
             {
                 while (await e.MoveNextAsync())
                 {
-                    onNext(e.Current, cancellationToken).Forget();
+                    try
+                    {
+                        onNext(e.Current, cancellationToken).Forget();
+                    }
+                    catch (Exception ex)
+                    {
+                        UniTaskScheduler.PublishUnobservedTaskException(ex);
+                    }
                 }
                 onCompleted();
             }
@@ -291,7 +428,14 @@ namespace Cysharp.Threading.Tasks.Linq
             {
                 while (await e.MoveNextAsync())
                 {
-                    observer.OnNext(e.Current);
+                    try
+                    {
+                        observer.OnNext(e.Current);
+                    }
+                    catch (Exception ex)
+                    {
+                        UniTaskScheduler.PublishUnobservedTaskException(ex);
+                    }
                 }
                 observer.OnCompleted();
             }
@@ -309,5 +453,84 @@ namespace Cysharp.Threading.Tasks.Linq
                 }
             }
         }
+
+        public static async UniTaskVoid SubscribeAwaitCore<TSource>(IUniTaskAsyncEnumerable<TSource> source, Func<TSource, UniTask> onNext, Action<Exception> onError, Action onCompleted, CancellationToken cancellationToken)
+        {
+            var e = source.GetAsyncEnumerator(cancellationToken);
+            try
+            {
+                while (await e.MoveNextAsync())
+                {
+                    try
+                    {
+                        await onNext(e.Current);
+                    }
+                    catch (Exception ex)
+                    {
+                        UniTaskScheduler.PublishUnobservedTaskException(ex);
+                    }
+                }
+                onCompleted();
+            }
+            catch (Exception ex)
+            {
+                if (onError == NopError)
+                {
+                    UniTaskScheduler.PublishUnobservedTaskException(ex);
+                    return;
+                }
+
+                if (ex is OperationCanceledException) return;
+
+                onError(ex);
+            }
+            finally
+            {
+                if (e != null)
+                {
+                    await e.DisposeAsync();
+                }
+            }
+        }
+
+        public static async UniTaskVoid SubscribeAwaitCore<TSource>(IUniTaskAsyncEnumerable<TSource> source, Func<TSource, CancellationToken, UniTask> onNext, Action<Exception> onError, Action onCompleted, CancellationToken cancellationToken)
+        {
+            var e = source.GetAsyncEnumerator(cancellationToken);
+            try
+            {
+                while (await e.MoveNextAsync())
+                {
+                    try
+                    {
+                        await onNext(e.Current, cancellationToken);
+                    }
+                    catch (Exception ex)
+                    {
+                        UniTaskScheduler.PublishUnobservedTaskException(ex);
+                    }
+                }
+                onCompleted();
+            }
+            catch (Exception ex)
+            {
+                if (onError == NopError)
+                {
+                    UniTaskScheduler.PublishUnobservedTaskException(ex);
+                    return;
+                }
+
+                if (ex is OperationCanceledException) return;
+
+                onError(ex);
+            }
+            finally
+            {
+                if (e != null)
+                {
+                    await e.DisposeAsync();
+                }
+            }
+        }
+
     }
 }

src/UniTask/Assets/Plugins/UniTask/Runtime/Linq/ToArray.cs

@@ -19,8 +19,6 @@ namespace Cysharp.Threading.Tasks.Linq
     {
         internal static async UniTask<TSource[]> ToArrayAsync<TSource>(IUniTaskAsyncEnumerable<TSource> source, CancellationToken cancellationToken)
         {
-            // UnityEngine.Debug.Log("Called ToArray");
-
             var pool = ArrayPool<TSource>.Shared;
             var array = pool.Rent(16);
 

src/UniTask/Assets/Plugins/UniTask/Runtime/Linq/UnityExtensions/EveryValueChanged.cs

@@ -208,7 +208,6 @@ namespace Cysharp.Threading.Tasks.Linq
 
             public bool MoveNext()
             {
-                UnityEngine.Debug.Log("TRY_RESULT:" + target.TryGetTarget(out var _));
                 if (disposed || cancellationToken.IsCancellationRequested || !target.TryGetTarget(out var t))
                 {
                     completionSource.TrySetResult(false);

src/UniTask/Assets/Plugins/UniTask/Runtime/PlayerLoopHelper.cs

@@ -8,8 +8,10 @@ using System.Threading;
 
 #if UNITY_2019_3_OR_NEWER
 using UnityEngine.LowLevel;
+using PlayerLoopType = UnityEngine.PlayerLoop;
 #else
 using UnityEngine.Experimental.LowLevel;
+using PlayerLoopType = UnityEngine.Experimental.PlayerLoop;
 #endif
 
 #if UNITY_EDITOR
@@ -57,6 +59,13 @@ namespace Cysharp.Threading.Tasks
         public struct UniTaskLoopRunnerLastYieldUpdate { };
         public struct UniTaskLoopRunnerLastYieldPreLateUpdate { };
         public struct UniTaskLoopRunnerLastYieldPostLateUpdate { };
+
+#if UNITY_2020_2_OR_NEWER
+        public struct UniTaskLoopRunnerTimeUpdate { };
+        public struct UniTaskLoopRunnerLastTimeUpdate { };
+        public struct UniTaskLoopRunnerYieldTimeUpdate { };
+        public struct UniTaskLoopRunnerLastYieldTimeUpdate { };
+#endif
     }
 
     public enum PlayerLoopTiming
@@ -80,7 +89,13 @@ namespace Cysharp.Threading.Tasks
         LastPreLateUpdate = 11,
 
         PostLateUpdate = 12,
-        LastPostLateUpdate = 13
+        LastPostLateUpdate = 13,
+
+#if UNITY_2020_2_OR_NEWER
+        // Unity 2020.2 added TimeUpdate https://docs.unity3d.com/2020.2/Documentation/ScriptReference/PlayerLoop.TimeUpdate.html
+        TimeUpdate = 14,
+        LastTimeUpdate = 15,
+#endif
     }
 
     public interface IPlayerLoopItem
@@ -101,7 +116,7 @@ namespace Cysharp.Threading.Tasks
         static SynchronizationContext unitySynchronizationContetext;
         static ContinuationQueue[] yielders;
         static PlayerLoopRunner[] runners;
-
+        internal static bool IsEditorApplicationQuitting { get; private set; }
         static PlayerLoopSystem[] InsertRunner(PlayerLoopSystem loopSystem,
             Type loopRunnerYieldType, ContinuationQueue cq, Type lastLoopRunnerYieldType, ContinuationQueue lastCq,
             Type loopRunnerType, PlayerLoopRunner runner, Type lastLoopRunnerType, PlayerLoopRunner lastRunner)
@@ -110,27 +125,32 @@ namespace Cysharp.Threading.Tasks
 #if UNITY_EDITOR
             EditorApplication.playModeStateChanged += (state) =>
             {
-                if (state == PlayModeStateChange.EnteredEditMode || state == PlayModeStateChange.EnteredPlayMode)
+                if (state == PlayModeStateChange.EnteredEditMode || state == PlayModeStateChange.ExitingEditMode)
                 {
-                    return;
-                }
+                    IsEditorApplicationQuitting = true;
+                    // run rest action before clear.
+                    if (runner != null)
+                    {
+                        runner.Run();
+                        runner.Clear();
+                    }
+                    if (lastRunner != null)
+                    {
+                        lastRunner.Run();
+                        lastRunner.Clear();
+                    }
 
-                if (runner != null)
-                {
-                    runner.Clear();
-                }
-                if (lastRunner != null)
-                {
-                    lastRunner.Clear();
-                }
-
-                if (cq != null)
-                {
-                    cq.Clear();
-                }
-                if (lastCq != null)
-                {
-                    lastCq.Clear();
+                    if (cq != null)
+                    {
+                        cq.Run();
+                        cq.Clear();
+                    }
+                    if (lastCq != null)
+                    {
+                        lastCq.Run();
+                        lastCq.Clear();
+                    }
+                    IsEditorApplicationQuitting = false;
                 }
             };
 #endif
@@ -175,6 +195,32 @@ namespace Cysharp.Threading.Tasks
             return dest;
         }
 
+        static PlayerLoopSystem[] InsertUniTaskSynchronizationContext(PlayerLoopSystem loopSystem)
+        {
+            var loop = new PlayerLoopSystem
+            {
+                type = typeof(UniTaskSynchronizationContext),
+                updateDelegate = UniTaskSynchronizationContext.Run
+            };
+
+            // Remove items from previous initializations.
+            var source = loopSystem.subSystemList
+                .Where(ls => ls.type != typeof(UniTaskSynchronizationContext))
+                .ToArray();
+
+            var dest = new System.Collections.Generic.List<PlayerLoopSystem>(source);
+
+            var index = dest.FindIndex(x => x.type.Name == "ScriptRunDelayedTasks");
+            if (index == -1)
+            {
+                index = dest.FindIndex(x => x.type.Name == "UniTaskLoopRunnerUpdate");
+            }
+
+            dest.Insert(index + 1, loop);
+
+            return dest.ToArray();
+        }
+
         [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.BeforeSceneLoad)]
         static void Init()
         {
@@ -246,52 +292,90 @@ namespace Cysharp.Threading.Tasks
                     if (item != null) item.Run();
                 }
             }
+
+            UniTaskSynchronizationContext.Run();
         }
 
 #endif
 
+        private static int FindLoopSystemIndex(PlayerLoopSystem[] playerLoopList, Type systemType)
+        {
+            for (int i = 0; i < playerLoopList.Length; i++)
+            {
+                if (playerLoopList[i].type == systemType)
+                {
+                    return i;
+                }
+            }
+
+            throw new Exception("Target PlayerLoopSystem does not found. Type:" + systemType.FullName);
+        }
+
         public static void Initialize(ref PlayerLoopSystem playerLoop)
         {
+#if UNITY_2020_2_OR_NEWER
+            yielders = new ContinuationQueue[16];
+            runners = new PlayerLoopRunner[16];
+#else
             yielders = new ContinuationQueue[14];
             runners = new PlayerLoopRunner[14];
+#endif
 
             var copyList = playerLoop.subSystemList.ToArray();
 
-            // Initialization
-            copyList[0].subSystemList = InsertRunner(copyList[0], typeof(UniTaskLoopRunners.UniTaskLoopRunnerYieldInitialization), yielders[0] = new ContinuationQueue(PlayerLoopTiming.Initialization),
+            var i = FindLoopSystemIndex(copyList, typeof(PlayerLoopType.Initialization));
+            copyList[i].subSystemList = InsertRunner(copyList[i], typeof(UniTaskLoopRunners.UniTaskLoopRunnerYieldInitialization), yielders[0] = new ContinuationQueue(PlayerLoopTiming.Initialization),
                                                                   typeof(UniTaskLoopRunners.UniTaskLoopRunnerLastYieldInitialization), yielders[1] = new ContinuationQueue(PlayerLoopTiming.LastInitialization),
-                                                                  typeof(UniTaskLoopRunners.UniTaskLoopRunnerInitialization), runners[1] = new PlayerLoopRunner(PlayerLoopTiming.Initialization),
+                                                                  typeof(UniTaskLoopRunners.UniTaskLoopRunnerInitialization), runners[0] = new PlayerLoopRunner(PlayerLoopTiming.Initialization),
                                                                   typeof(UniTaskLoopRunners.UniTaskLoopRunnerLastInitialization), runners[1] = new PlayerLoopRunner(PlayerLoopTiming.LastInitialization));
             // EarlyUpdate
-            copyList[1].subSystemList = InsertRunner(copyList[1], typeof(UniTaskLoopRunners.UniTaskLoopRunnerYieldEarlyUpdate), yielders[2] = new ContinuationQueue(PlayerLoopTiming.EarlyUpdate),
+            i = FindLoopSystemIndex(copyList, typeof(PlayerLoopType.EarlyUpdate));
+            copyList[i].subSystemList = InsertRunner(copyList[i], typeof(UniTaskLoopRunners.UniTaskLoopRunnerYieldEarlyUpdate), yielders[2] = new ContinuationQueue(PlayerLoopTiming.EarlyUpdate),
                                                                   typeof(UniTaskLoopRunners.UniTaskLoopRunnerLastYieldEarlyUpdate), yielders[3] = new ContinuationQueue(PlayerLoopTiming.LastEarlyUpdate),
                                                                   typeof(UniTaskLoopRunners.UniTaskLoopRunnerEarlyUpdate), runners[2] = new PlayerLoopRunner(PlayerLoopTiming.EarlyUpdate),
                                                                   typeof(UniTaskLoopRunners.UniTaskLoopRunnerLastEarlyUpdate), runners[3] = new PlayerLoopRunner(PlayerLoopTiming.LastEarlyUpdate));
             // FixedUpdate
-            copyList[2].subSystemList = InsertRunner(copyList[2], typeof(UniTaskLoopRunners.UniTaskLoopRunnerYieldFixedUpdate), yielders[4] = new ContinuationQueue(PlayerLoopTiming.FixedUpdate),
+            i = FindLoopSystemIndex(copyList, typeof(PlayerLoopType.FixedUpdate));
+            copyList[i].subSystemList = InsertRunner(copyList[i], typeof(UniTaskLoopRunners.UniTaskLoopRunnerYieldFixedUpdate), yielders[4] = new ContinuationQueue(PlayerLoopTiming.FixedUpdate),
                                                                   typeof(UniTaskLoopRunners.UniTaskLoopRunnerLastYieldFixedUpdate), yielders[5] = new ContinuationQueue(PlayerLoopTiming.LastFixedUpdate),
                                                                   typeof(UniTaskLoopRunners.UniTaskLoopRunnerFixedUpdate), runners[4] = new PlayerLoopRunner(PlayerLoopTiming.FixedUpdate),
                                                                   typeof(UniTaskLoopRunners.UniTaskLoopRunnerLastFixedUpdate), runners[5] = new PlayerLoopRunner(PlayerLoopTiming.LastFixedUpdate));
             // PreUpdate
-            copyList[3].subSystemList = InsertRunner(copyList[3], typeof(UniTaskLoopRunners.UniTaskLoopRunnerYieldPreUpdate), yielders[6] = new ContinuationQueue(PlayerLoopTiming.PreUpdate),
+            i = FindLoopSystemIndex(copyList, typeof(PlayerLoopType.PreUpdate));
+            copyList[i].subSystemList = InsertRunner(copyList[i], typeof(UniTaskLoopRunners.UniTaskLoopRunnerYieldPreUpdate), yielders[6] = new ContinuationQueue(PlayerLoopTiming.PreUpdate),
                                                                   typeof(UniTaskLoopRunners.UniTaskLoopRunnerLastYieldPreUpdate), yielders[7] = new ContinuationQueue(PlayerLoopTiming.LastPreUpdate),
                                                                   typeof(UniTaskLoopRunners.UniTaskLoopRunnerPreUpdate), runners[6] = new PlayerLoopRunner(PlayerLoopTiming.PreUpdate),
                                                                   typeof(UniTaskLoopRunners.UniTaskLoopRunnerLastPreUpdate), runners[7] = new PlayerLoopRunner(PlayerLoopTiming.LastPreUpdate));
             // Update
-            copyList[4].subSystemList = InsertRunner(copyList[4], typeof(UniTaskLoopRunners.UniTaskLoopRunnerYieldUpdate), yielders[8] = new ContinuationQueue(PlayerLoopTiming.Update),
+            i = FindLoopSystemIndex(copyList, typeof(PlayerLoopType.Update));
+            copyList[i].subSystemList = InsertRunner(copyList[i], typeof(UniTaskLoopRunners.UniTaskLoopRunnerYieldUpdate), yielders[8] = new ContinuationQueue(PlayerLoopTiming.Update),
                                                                   typeof(UniTaskLoopRunners.UniTaskLoopRunnerLastYieldUpdate), yielders[9] = new ContinuationQueue(PlayerLoopTiming.LastUpdate),
                                                                   typeof(UniTaskLoopRunners.UniTaskLoopRunnerUpdate), runners[8] = new PlayerLoopRunner(PlayerLoopTiming.Update),
                                                                   typeof(UniTaskLoopRunners.UniTaskLoopRunnerLastUpdate), runners[9] = new PlayerLoopRunner(PlayerLoopTiming.LastUpdate));
             // PreLateUpdate
-            copyList[5].subSystemList = InsertRunner(copyList[5], typeof(UniTaskLoopRunners.UniTaskLoopRunnerYieldPreLateUpdate), yielders[10] = new ContinuationQueue(PlayerLoopTiming.PreLateUpdate),
+            i = FindLoopSystemIndex(copyList, typeof(PlayerLoopType.PreLateUpdate));
+            copyList[i].subSystemList = InsertRunner(copyList[i], typeof(UniTaskLoopRunners.UniTaskLoopRunnerYieldPreLateUpdate), yielders[10] = new ContinuationQueue(PlayerLoopTiming.PreLateUpdate),
                                                                   typeof(UniTaskLoopRunners.UniTaskLoopRunnerLastYieldPreLateUpdate), yielders[11] = new ContinuationQueue(PlayerLoopTiming.LastPreLateUpdate),
                                                                   typeof(UniTaskLoopRunners.UniTaskLoopRunnerPreLateUpdate), runners[10] = new PlayerLoopRunner(PlayerLoopTiming.PreLateUpdate),
                                                                   typeof(UniTaskLoopRunners.UniTaskLoopRunnerLastPreLateUpdate), runners[11] = new PlayerLoopRunner(PlayerLoopTiming.LastPreLateUpdate));
             // PostLateUpdate
-            copyList[6].subSystemList = InsertRunner(copyList[6], typeof(UniTaskLoopRunners.UniTaskLoopRunnerYieldPostLateUpdate), yielders[12] = new ContinuationQueue(PlayerLoopTiming.PostLateUpdate),
+            i = FindLoopSystemIndex(copyList, typeof(PlayerLoopType.PostLateUpdate));
+            copyList[i].subSystemList = InsertRunner(copyList[i], typeof(UniTaskLoopRunners.UniTaskLoopRunnerYieldPostLateUpdate), yielders[12] = new ContinuationQueue(PlayerLoopTiming.PostLateUpdate),
                                                                   typeof(UniTaskLoopRunners.UniTaskLoopRunnerLastYieldPostLateUpdate), yielders[13] = new ContinuationQueue(PlayerLoopTiming.LastPostLateUpdate),
                                                                   typeof(UniTaskLoopRunners.UniTaskLoopRunnerPostLateUpdate), runners[12] = new PlayerLoopRunner(PlayerLoopTiming.PostLateUpdate),
                                                                   typeof(UniTaskLoopRunners.UniTaskLoopRunnerLastPostLateUpdate), runners[13] = new PlayerLoopRunner(PlayerLoopTiming.LastPostLateUpdate));
+#if UNITY_2020_2_OR_NEWER
+            // TimeUpdate
+            i = FindLoopSystemIndex(copyList, typeof(PlayerLoopType.TimeUpdate));
+            copyList[i].subSystemList = InsertRunner(copyList[i], typeof(UniTaskLoopRunners.UniTaskLoopRunnerYieldTimeUpdate), yielders[14] = new ContinuationQueue(PlayerLoopTiming.TimeUpdate),
+                                                                    typeof(UniTaskLoopRunners.UniTaskLoopRunnerLastYieldTimeUpdate), yielders[15] = new ContinuationQueue(PlayerLoopTiming.LastTimeUpdate),
+                                                                    typeof(UniTaskLoopRunners.UniTaskLoopRunnerTimeUpdate), runners[14] = new PlayerLoopRunner(PlayerLoopTiming.TimeUpdate),
+                                                                    typeof(UniTaskLoopRunners.UniTaskLoopRunnerLastTimeUpdate), runners[15] = new PlayerLoopRunner(PlayerLoopTiming.LastTimeUpdate));
+#endif
+
+            // Insert UniTaskSynchronizationContext to Update loop
+            i = FindLoopSystemIndex(copyList, typeof(PlayerLoopType.Update));
+            copyList[i].subSystemList = InsertUniTaskSynchronizationContext(copyList[i]);
 
             playerLoop.subSystemList = copyList;
             PlayerLoop.SetPlayerLoop(playerLoop);
@@ -306,6 +390,56 @@ namespace Cysharp.Threading.Tasks
         {
             yielders[(int)timing].Enqueue(continuation);
         }
+
+        // Diagnostics helper
+
+#if UNITY_2019_3_OR_NEWER
+
+        public static void DumpCurrentPlayerLoop()
+        {
+            var playerLoop = UnityEngine.LowLevel.PlayerLoop.GetCurrentPlayerLoop();
+
+            var sb = new System.Text.StringBuilder();
+            sb.AppendLine($"PlayerLoop List");
+            foreach (var header in playerLoop.subSystemList)
+            {
+                sb.AppendFormat("------{0}------", header.type.Name);
+                sb.AppendLine();
+                foreach (var subSystem in header.subSystemList)
+                {
+                    sb.AppendFormat("{0}", subSystem.type.Name);
+                    sb.AppendLine();
+
+                    if (subSystem.subSystemList != null)
+                    {
+                        UnityEngine.Debug.LogWarning("More Subsystem:" + subSystem.subSystemList.Length);
+                    }
+                }
+            }
+
+            UnityEngine.Debug.Log(sb.ToString());
+        }
+
+        public static bool IsInjectedUniTaskPlayerLoop()
+        {
+            var playerLoop = UnityEngine.LowLevel.PlayerLoop.GetCurrentPlayerLoop();
+
+            foreach (var header in playerLoop.subSystemList)
+            {
+                foreach (var subSystem in header.subSystemList)
+                {
+                    if (subSystem.type == typeof(UniTaskLoopRunners.UniTaskLoopRunnerInitialization))
+                    {
+                        return true;
+                    }
+                }
+            }
+
+            return false;
+        }
+
+#endif
+
     }
 }
 

src/UniTask/Assets/Plugins/UniTask/Runtime/TaskPool.cs

@@ -12,7 +12,9 @@ namespace Cysharp.Threading.Tasks
     public static class TaskPool
     {
         internal static int MaxPoolSize;
-        static ConcurrentDictionary<Type, Func<int>> sizes = new ConcurrentDictionary<Type, Func<int>>();
+
+        // avoid to use ConcurrentDictionary for safety of WebGL build.
+        static Dictionary<Type, Func<int>> sizes = new Dictionary<Type, Func<int>>();
 
         static TaskPool()
         {
@@ -40,22 +42,27 @@ namespace Cysharp.Threading.Tasks
 
         public static IEnumerable<(Type, int)> GetCacheSizeInfo()
         {
-            foreach (var item in sizes)
+            lock (sizes)
             {
-                yield return (item.Key, item.Value());
+                foreach (var item in sizes)
+                {
+                    yield return (item.Key, item.Value());
+                }
             }
         }
 
         public static void RegisterSizeGetter(Type type, Func<int> getSize)
         {
-            sizes[type] = getSize;
+            lock (sizes)
+            {
+                sizes[type] = getSize;
+            }
         }
     }
 
-
     public interface ITaskPoolNode<T>
     {
-        T NextNode { get; set; }
+        ref T NextNode { get; }
     }
 
     // mutable struct, don't mark readonly.
@@ -77,8 +84,9 @@ namespace Cysharp.Threading.Tasks
                 var v = root;
                 if (!(v is null))
                 {
-                    root = v.NextNode;
-                    v.NextNode = null;
+                    ref var nextNode = ref v.NextNode;
+                    root = nextNode;
+                    nextNode = null;
                     size--;
                     result = v;
                     Volatile.Write(ref gate, 0);

src/UniTask/Assets/Plugins/UniTask/Runtime/Triggers/MonoBehaviourMessagesTriggers.cs

@@ -2,7 +2,9 @@
 
 using System.Threading;
 using UnityEngine;
+#if !UNITY_2019_1_OR_NEWER || UNITASK_UGUI_SUPPORT
 using UnityEngine.EventSystems;
+#endif
 
 namespace Cysharp.Threading.Tasks.Triggers
 {
@@ -715,6 +717,7 @@ namespace Cysharp.Threading.Tasks.Triggers
 #endregion
 
 #region CollisionEnter
+#if !UNITY_2019_1_OR_NEWER || UNITASK_PHYSICS_SUPPORT
 
     public interface IAsyncOnCollisionEnterHandler
     {
@@ -771,9 +774,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnCollisionEnterHandler)new AsyncTriggerHandler<Collision>(this, cancellationToken, true)).OnCollisionEnterAsync();
         }
     }
+#endif
 #endregion
 
 #region CollisionEnter2D
+#if !UNITY_2019_1_OR_NEWER || UNITASK_PHYSICS2D_SUPPORT
 
     public interface IAsyncOnCollisionEnter2DHandler
     {
@@ -830,9 +835,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnCollisionEnter2DHandler)new AsyncTriggerHandler<Collision2D>(this, cancellationToken, true)).OnCollisionEnter2DAsync();
         }
     }
+#endif
 #endregion
 
 #region CollisionExit
+#if !UNITY_2019_1_OR_NEWER || UNITASK_PHYSICS_SUPPORT
 
     public interface IAsyncOnCollisionExitHandler
     {
@@ -889,9 +896,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnCollisionExitHandler)new AsyncTriggerHandler<Collision>(this, cancellationToken, true)).OnCollisionExitAsync();
         }
     }
+#endif
 #endregion
 
 #region CollisionExit2D
+#if !UNITY_2019_1_OR_NEWER || UNITASK_PHYSICS2D_SUPPORT
 
     public interface IAsyncOnCollisionExit2DHandler
     {
@@ -948,9 +957,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnCollisionExit2DHandler)new AsyncTriggerHandler<Collision2D>(this, cancellationToken, true)).OnCollisionExit2DAsync();
         }
     }
+#endif
 #endregion
 
 #region CollisionStay
+#if !UNITY_2019_1_OR_NEWER || UNITASK_PHYSICS_SUPPORT
 
     public interface IAsyncOnCollisionStayHandler
     {
@@ -1007,9 +1018,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnCollisionStayHandler)new AsyncTriggerHandler<Collision>(this, cancellationToken, true)).OnCollisionStayAsync();
         }
     }
+#endif
 #endregion
 
 #region CollisionStay2D
+#if !UNITY_2019_1_OR_NEWER || UNITASK_PHYSICS2D_SUPPORT
 
     public interface IAsyncOnCollisionStay2DHandler
     {
@@ -1066,9 +1079,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnCollisionStay2DHandler)new AsyncTriggerHandler<Collision2D>(this, cancellationToken, true)).OnCollisionStay2DAsync();
         }
     }
+#endif
 #endregion
 
 #region ControllerColliderHit
+#if !UNITY_2019_1_OR_NEWER || UNITASK_PHYSICS_SUPPORT
 
     public interface IAsyncOnControllerColliderHitHandler
     {
@@ -1125,6 +1140,7 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnControllerColliderHitHandler)new AsyncTriggerHandler<ControllerColliderHit>(this, cancellationToken, true)).OnControllerColliderHitAsync();
         }
     }
+#endif
 #endregion
 
 #region Disable
@@ -1423,6 +1439,7 @@ namespace Cysharp.Threading.Tasks.Triggers
 #endregion
 
 #region JointBreak
+#if !UNITY_2019_1_OR_NEWER || UNITASK_PHYSICS_SUPPORT
 
     public interface IAsyncOnJointBreakHandler
     {
@@ -1479,9 +1496,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnJointBreakHandler)new AsyncTriggerHandler<float>(this, cancellationToken, true)).OnJointBreakAsync();
         }
     }
+#endif
 #endregion
 
 #region JointBreak2D
+#if !UNITY_2019_1_OR_NEWER || UNITASK_PHYSICS2D_SUPPORT
 
     public interface IAsyncOnJointBreak2DHandler
     {
@@ -1538,9 +1557,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnJointBreak2DHandler)new AsyncTriggerHandler<Joint2D>(this, cancellationToken, true)).OnJointBreak2DAsync();
         }
     }
+#endif
 #endregion
 
 #region MouseDown
+#if !(UNITY_IPHONE || UNITY_ANDROID || UNITY_METRO)
 
     public interface IAsyncOnMouseDownHandler
     {
@@ -1597,9 +1618,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnMouseDownHandler)new AsyncTriggerHandler<AsyncUnit>(this, cancellationToken, true)).OnMouseDownAsync();
         }
     }
+#endif
 #endregion
 
 #region MouseDrag
+#if !(UNITY_IPHONE || UNITY_ANDROID || UNITY_METRO)
 
     public interface IAsyncOnMouseDragHandler
     {
@@ -1656,9 +1679,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnMouseDragHandler)new AsyncTriggerHandler<AsyncUnit>(this, cancellationToken, true)).OnMouseDragAsync();
         }
     }
+#endif
 #endregion
 
 #region MouseEnter
+#if !(UNITY_IPHONE || UNITY_ANDROID || UNITY_METRO)
 
     public interface IAsyncOnMouseEnterHandler
     {
@@ -1715,9 +1740,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnMouseEnterHandler)new AsyncTriggerHandler<AsyncUnit>(this, cancellationToken, true)).OnMouseEnterAsync();
         }
     }
+#endif
 #endregion
 
 #region MouseExit
+#if !(UNITY_IPHONE || UNITY_ANDROID || UNITY_METRO)
 
     public interface IAsyncOnMouseExitHandler
     {
@@ -1774,9 +1801,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnMouseExitHandler)new AsyncTriggerHandler<AsyncUnit>(this, cancellationToken, true)).OnMouseExitAsync();
         }
     }
+#endif
 #endregion
 
 #region MouseOver
+#if !(UNITY_IPHONE || UNITY_ANDROID || UNITY_METRO)
 
     public interface IAsyncOnMouseOverHandler
     {
@@ -1833,9 +1862,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnMouseOverHandler)new AsyncTriggerHandler<AsyncUnit>(this, cancellationToken, true)).OnMouseOverAsync();
         }
     }
+#endif
 #endregion
 
 #region MouseUp
+#if !(UNITY_IPHONE || UNITY_ANDROID || UNITY_METRO)
 
     public interface IAsyncOnMouseUpHandler
     {
@@ -1892,9 +1923,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnMouseUpHandler)new AsyncTriggerHandler<AsyncUnit>(this, cancellationToken, true)).OnMouseUpAsync();
         }
     }
+#endif
 #endregion
 
 #region MouseUpAsButton
+#if !(UNITY_IPHONE || UNITY_ANDROID || UNITY_METRO)
 
     public interface IAsyncOnMouseUpAsButtonHandler
     {
@@ -1951,6 +1984,7 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnMouseUpAsButtonHandler)new AsyncTriggerHandler<AsyncUnit>(this, cancellationToken, true)).OnMouseUpAsButtonAsync();
         }
     }
+#endif
 #endregion
 
 #region ParticleCollision
@@ -2131,7 +2165,7 @@ namespace Cysharp.Threading.Tasks.Triggers
 #endregion
 
 #region ParticleUpdateJobScheduled
-#if UNITY_2019_3_OR_NEWER
+#if UNITY_2019_3_OR_NEWER && (!UNITY_2019_1_OR_NEWER || UNITASK_PARTICLESYSTEM_SUPPORT)
 
     public interface IAsyncOnParticleUpdateJobScheduledHandler
     {
@@ -2782,6 +2816,7 @@ namespace Cysharp.Threading.Tasks.Triggers
 #endregion
 
 #region TriggerEnter
+#if !UNITY_2019_1_OR_NEWER || UNITASK_PHYSICS_SUPPORT
 
     public interface IAsyncOnTriggerEnterHandler
     {
@@ -2838,9 +2873,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnTriggerEnterHandler)new AsyncTriggerHandler<Collider>(this, cancellationToken, true)).OnTriggerEnterAsync();
         }
     }
+#endif
 #endregion
 
 #region TriggerEnter2D
+#if !UNITY_2019_1_OR_NEWER || UNITASK_PHYSICS2D_SUPPORT
 
     public interface IAsyncOnTriggerEnter2DHandler
     {
@@ -2897,9 +2934,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnTriggerEnter2DHandler)new AsyncTriggerHandler<Collider2D>(this, cancellationToken, true)).OnTriggerEnter2DAsync();
         }
     }
+#endif
 #endregion
 
 #region TriggerExit
+#if !UNITY_2019_1_OR_NEWER || UNITASK_PHYSICS_SUPPORT
 
     public interface IAsyncOnTriggerExitHandler
     {
@@ -2956,9 +2995,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnTriggerExitHandler)new AsyncTriggerHandler<Collider>(this, cancellationToken, true)).OnTriggerExitAsync();
         }
     }
+#endif
 #endregion
 
 #region TriggerExit2D
+#if !UNITY_2019_1_OR_NEWER || UNITASK_PHYSICS2D_SUPPORT
 
     public interface IAsyncOnTriggerExit2DHandler
     {
@@ -3015,9 +3056,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnTriggerExit2DHandler)new AsyncTriggerHandler<Collider2D>(this, cancellationToken, true)).OnTriggerExit2DAsync();
         }
     }
+#endif
 #endregion
 
 #region TriggerStay
+#if !UNITY_2019_1_OR_NEWER || UNITASK_PHYSICS_SUPPORT
 
     public interface IAsyncOnTriggerStayHandler
     {
@@ -3074,9 +3117,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnTriggerStayHandler)new AsyncTriggerHandler<Collider>(this, cancellationToken, true)).OnTriggerStayAsync();
         }
     }
+#endif
 #endregion
 
 #region TriggerStay2D
+#if !UNITY_2019_1_OR_NEWER || UNITASK_PHYSICS2D_SUPPORT
 
     public interface IAsyncOnTriggerStay2DHandler
     {
@@ -3133,6 +3178,7 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnTriggerStay2DHandler)new AsyncTriggerHandler<Collider2D>(this, cancellationToken, true)).OnTriggerStay2DAsync();
         }
     }
+#endif
 #endregion
 
 #region Validate
@@ -3372,6 +3418,7 @@ namespace Cysharp.Threading.Tasks.Triggers
 #endregion
 
 #region BeginDrag
+#if !UNITY_2019_1_OR_NEWER || UNITASK_UGUI_SUPPORT
 
     public interface IAsyncOnBeginDragHandler
     {
@@ -3428,9 +3475,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnBeginDragHandler)new AsyncTriggerHandler<PointerEventData>(this, cancellationToken, true)).OnBeginDragAsync();
         }
     }
+#endif
 #endregion
 
 #region Cancel
+#if !UNITY_2019_1_OR_NEWER || UNITASK_UGUI_SUPPORT
 
     public interface IAsyncOnCancelHandler
     {
@@ -3487,9 +3536,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnCancelHandler)new AsyncTriggerHandler<BaseEventData>(this, cancellationToken, true)).OnCancelAsync();
         }
     }
+#endif
 #endregion
 
 #region Deselect
+#if !UNITY_2019_1_OR_NEWER || UNITASK_UGUI_SUPPORT
 
     public interface IAsyncOnDeselectHandler
     {
@@ -3546,9 +3597,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnDeselectHandler)new AsyncTriggerHandler<BaseEventData>(this, cancellationToken, true)).OnDeselectAsync();
         }
     }
+#endif
 #endregion
 
 #region Drag
+#if !UNITY_2019_1_OR_NEWER || UNITASK_UGUI_SUPPORT
 
     public interface IAsyncOnDragHandler
     {
@@ -3605,9 +3658,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnDragHandler)new AsyncTriggerHandler<PointerEventData>(this, cancellationToken, true)).OnDragAsync();
         }
     }
+#endif
 #endregion
 
 #region Drop
+#if !UNITY_2019_1_OR_NEWER || UNITASK_UGUI_SUPPORT
 
     public interface IAsyncOnDropHandler
     {
@@ -3664,9 +3719,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnDropHandler)new AsyncTriggerHandler<PointerEventData>(this, cancellationToken, true)).OnDropAsync();
         }
     }
+#endif
 #endregion
 
 #region EndDrag
+#if !UNITY_2019_1_OR_NEWER || UNITASK_UGUI_SUPPORT
 
     public interface IAsyncOnEndDragHandler
     {
@@ -3723,9 +3780,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnEndDragHandler)new AsyncTriggerHandler<PointerEventData>(this, cancellationToken, true)).OnEndDragAsync();
         }
     }
+#endif
 #endregion
 
 #region InitializePotentialDrag
+#if !UNITY_2019_1_OR_NEWER || UNITASK_UGUI_SUPPORT
 
     public interface IAsyncOnInitializePotentialDragHandler
     {
@@ -3782,9 +3841,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnInitializePotentialDragHandler)new AsyncTriggerHandler<PointerEventData>(this, cancellationToken, true)).OnInitializePotentialDragAsync();
         }
     }
+#endif
 #endregion
 
 #region Move
+#if !UNITY_2019_1_OR_NEWER || UNITASK_UGUI_SUPPORT
 
     public interface IAsyncOnMoveHandler
     {
@@ -3841,9 +3902,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnMoveHandler)new AsyncTriggerHandler<AxisEventData>(this, cancellationToken, true)).OnMoveAsync();
         }
     }
+#endif
 #endregion
 
 #region PointerClick
+#if !UNITY_2019_1_OR_NEWER || UNITASK_UGUI_SUPPORT
 
     public interface IAsyncOnPointerClickHandler
     {
@@ -3900,9 +3963,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnPointerClickHandler)new AsyncTriggerHandler<PointerEventData>(this, cancellationToken, true)).OnPointerClickAsync();
         }
     }
+#endif
 #endregion
 
 #region PointerDown
+#if !UNITY_2019_1_OR_NEWER || UNITASK_UGUI_SUPPORT
 
     public interface IAsyncOnPointerDownHandler
     {
@@ -3959,9 +4024,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnPointerDownHandler)new AsyncTriggerHandler<PointerEventData>(this, cancellationToken, true)).OnPointerDownAsync();
         }
     }
+#endif
 #endregion
 
 #region PointerEnter
+#if !UNITY_2019_1_OR_NEWER || UNITASK_UGUI_SUPPORT
 
     public interface IAsyncOnPointerEnterHandler
     {
@@ -4018,9 +4085,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnPointerEnterHandler)new AsyncTriggerHandler<PointerEventData>(this, cancellationToken, true)).OnPointerEnterAsync();
         }
     }
+#endif
 #endregion
 
 #region PointerExit
+#if !UNITY_2019_1_OR_NEWER || UNITASK_UGUI_SUPPORT
 
     public interface IAsyncOnPointerExitHandler
     {
@@ -4077,9 +4146,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnPointerExitHandler)new AsyncTriggerHandler<PointerEventData>(this, cancellationToken, true)).OnPointerExitAsync();
         }
     }
+#endif
 #endregion
 
 #region PointerUp
+#if !UNITY_2019_1_OR_NEWER || UNITASK_UGUI_SUPPORT
 
     public interface IAsyncOnPointerUpHandler
     {
@@ -4136,9 +4207,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnPointerUpHandler)new AsyncTriggerHandler<PointerEventData>(this, cancellationToken, true)).OnPointerUpAsync();
         }
     }
+#endif
 #endregion
 
 #region Scroll
+#if !UNITY_2019_1_OR_NEWER || UNITASK_UGUI_SUPPORT
 
     public interface IAsyncOnScrollHandler
     {
@@ -4195,9 +4268,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnScrollHandler)new AsyncTriggerHandler<PointerEventData>(this, cancellationToken, true)).OnScrollAsync();
         }
     }
+#endif
 #endregion
 
 #region Select
+#if !UNITY_2019_1_OR_NEWER || UNITASK_UGUI_SUPPORT
 
     public interface IAsyncOnSelectHandler
     {
@@ -4254,9 +4329,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnSelectHandler)new AsyncTriggerHandler<BaseEventData>(this, cancellationToken, true)).OnSelectAsync();
         }
     }
+#endif
 #endregion
 
 #region Submit
+#if !UNITY_2019_1_OR_NEWER || UNITASK_UGUI_SUPPORT
 
     public interface IAsyncOnSubmitHandler
     {
@@ -4313,9 +4390,11 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnSubmitHandler)new AsyncTriggerHandler<BaseEventData>(this, cancellationToken, true)).OnSubmitAsync();
         }
     }
+#endif
 #endregion
 
 #region UpdateSelected
+#if !UNITY_2019_1_OR_NEWER || UNITASK_UGUI_SUPPORT
 
     public interface IAsyncOnUpdateSelectedHandler
     {
@@ -4372,6 +4451,7 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((IAsyncOnUpdateSelectedHandler)new AsyncTriggerHandler<BaseEventData>(this, cancellationToken, true)).OnUpdateSelectedAsync();
         }
     }
+#endif
 #endregion
 
 }

src/UniTask/Assets/Plugins/UniTask/Runtime/Triggers/MonoBehaviourMessagesTriggers.tt

@@ -25,13 +25,7 @@
         ("Update", "Update", "AsyncUnit", null, empty),
         ("FixedUpdate", "FixedUpdate", "AsyncUnit", null, empty),
         ("LateUpdate", "LateUpdate", "AsyncUnit", null, empty),
-        ("MouseDown", "OnMouseDown", "AsyncUnit", null, empty),
-        ("MouseDrag", "OnMouseDrag", "AsyncUnit", null, empty),
-        ("MouseEnter", "OnMouseEnter", "AsyncUnit", null, empty),
-        ("MouseExit", "OnMouseExit", "AsyncUnit", null, empty),
-        ("MouseOver", "OnMouseOver", "AsyncUnit", null, empty),
-        ("MouseUp", "OnMouseUp", "AsyncUnit", null, empty),
-        ("MouseUpAsButton", "OnMouseUpAsButton", "AsyncUnit", null, empty),
+        
         ("ParticleCollision", "OnParticleCollision", "GameObject", null, new []{ ("GameObject", "other") }),
         ("RectTransformDimensionsChange", "OnRectTransformDimensionsChange", "AsyncUnit", null, empty),
         ("RectTransformRemoved", "OnRectTransformRemoved", "AsyncUnit", null, empty),
@@ -47,6 +41,15 @@
         ("BecameInvisible", "OnBecameInvisible", "AsyncUnit", null, empty),
         ("BecameVisible", "OnBecameVisible", "AsyncUnit", null, empty),
         
+        // Mouse... #if !(UNITY_IPHONE || UNITY_ANDROID || UNITY_METRO)
+        ("MouseDown", "OnMouseDown", "AsyncUnit", null, empty),
+        ("MouseDrag", "OnMouseDrag", "AsyncUnit", null, empty),
+        ("MouseEnter", "OnMouseEnter", "AsyncUnit", null, empty),
+        ("MouseExit", "OnMouseExit", "AsyncUnit", null, empty),
+        ("MouseOver", "OnMouseOver", "AsyncUnit", null, empty),
+        ("MouseUp", "OnMouseUp", "AsyncUnit", null, empty),
+        ("MouseUpAsButton", "OnMouseUpAsButton", "AsyncUnit", null, empty),
+
         // new in v2
         ("ApplicationFocus", "OnApplicationFocus", "bool", null, new []{("bool", "hasFocus") }),
         ("ApplicationPause", "OnApplicationPause", "bool", null, new []{("bool", "pauseStatus") }),
@@ -103,20 +106,36 @@
     Func<(string argType, string argName)[], string> BuildMethodArgument = x => string.Join(", ", x.Select(y => y.argType + " " + y.argName));
     Func<(string argType, string argName)[], string> BuildResultParameter = x => x.Length == 0 ? "AsyncUnit.Default" : "(" + string.Join(", ", x.Select(y => y.argName)) + ")";
 
-    Func<string, bool> Is2019_3 = x => x == "ParticleUpdateJobScheduled";
+    Func<string, bool> IsParticleSystem = x => x == "ParticleUpdateJobScheduled";
+    Func<string, bool> IsMouseTrigger = x => x.StartsWith("Mouse");
+    Func<string, string> RequirePhysicsModule = x => (x.StartsWith("Collision") || x.StartsWith("Collider") || x.StartsWith("ControllerCollider") || x.StartsWith("Joint") || x.StartsWith("Trigger"))
+        ? (x.Contains("2D") ? "UNITASK_PHYSICS2D_SUPPORT" : "UNITASK_PHYSICS_SUPPORT") 
+        : null;
+    Func<string, bool> IsUguiSystem = x => x != null;
 #>
 #pragma warning disable CS1591 // Missing XML comment for publicly visible type or member
 
 using System.Threading;
 using UnityEngine;
+#if !UNITY_2019_1_OR_NEWER || UNITASK_UGUI_SUPPORT
 using UnityEngine.EventSystems;
+#endif
 
 namespace Cysharp.Threading.Tasks.Triggers
 {
 <# foreach(var t in triggers) { #>
 #region <#= t.triggerName #>
-<# if(Is2019_3(t.triggerName)) { #>
-#if UNITY_2019_3_OR_NEWER
+<# if(IsUguiSystem(t.handlerInterface)) { #>
+#if !UNITY_2019_1_OR_NEWER || UNITASK_UGUI_SUPPORT
+<# } #>
+<# if(IsParticleSystem(t.triggerName)) { #>
+#if UNITY_2019_3_OR_NEWER && (!UNITY_2019_1_OR_NEWER || UNITASK_PARTICLESYSTEM_SUPPORT)
+<# } #>
+<# if(IsMouseTrigger(t.triggerName)) { #>
+#if !(UNITY_IPHONE || UNITY_ANDROID || UNITY_METRO)
+<# } #>
+<# if(RequirePhysicsModule(t.triggerName) != null) { #>
+#if !UNITY_2019_1_OR_NEWER || <#= RequirePhysicsModule(t.triggerName) #>
 <# } #>
 
     public interface <#= ToInterfaceName(t.methodName) #>
@@ -174,7 +193,13 @@ namespace Cysharp.Threading.Tasks.Triggers
             return ((<#= ToInterfaceName(t.methodName) #>)new AsyncTriggerHandler<<#= t.returnType #>>(this, cancellationToken, true)).<#= t.methodName #>Async();
         }
     }
-<# if(Is2019_3(t.triggerName)) { #>
+<# if(IsUguiSystem(t.handlerInterface)) { #>
+#endif
+<# } #>
+<# if(RequirePhysicsModule(t.triggerName) != null) { #>
+#endif
+<# } #>
+<# if(IsParticleSystem(t.triggerName) || IsMouseTrigger(t.triggerName)) { #>
 #endif
 <# } #>
 #endregion

src/UniTask/Assets/Plugins/UniTask/Runtime/UniTask.Delay.cs

@@ -127,7 +127,8 @@ namespace Cysharp.Threading.Tasks
         sealed class YieldPromise : IUniTaskSource, IPlayerLoopItem, ITaskPoolNode<YieldPromise>
         {
             static TaskPool<YieldPromise> pool;
-            public YieldPromise NextNode { get; set; }
+            YieldPromise nextNode;
+            public ref YieldPromise NextNode => ref nextNode;
 
             static YieldPromise()
             {
@@ -215,7 +216,8 @@ namespace Cysharp.Threading.Tasks
         sealed class NextFramePromise : IUniTaskSource, IPlayerLoopItem, ITaskPoolNode<NextFramePromise>
         {
             static TaskPool<NextFramePromise> pool;
-            public NextFramePromise NextNode { get; set; }
+            NextFramePromise nextNode;
+            public ref NextFramePromise NextNode => ref nextNode;
 
             static NextFramePromise()
             {
@@ -309,7 +311,8 @@ namespace Cysharp.Threading.Tasks
         sealed class DelayFramePromise : IUniTaskSource, IPlayerLoopItem, ITaskPoolNode<DelayFramePromise>
         {
             static TaskPool<DelayFramePromise> pool;
-            public DelayFramePromise NextNode { get; set; }
+            DelayFramePromise nextNode;
+            public ref DelayFramePromise NextNode => ref nextNode;
 
             static DelayFramePromise()
             {
@@ -424,7 +427,8 @@ namespace Cysharp.Threading.Tasks
         sealed class DelayPromise : IUniTaskSource, IPlayerLoopItem, ITaskPoolNode<DelayPromise>
         {
             static TaskPool<DelayPromise> pool;
-            public DelayPromise NextNode { get; set; }
+            DelayPromise nextNode;
+            public ref DelayPromise NextNode => ref nextNode;
 
             static DelayPromise()
             {
@@ -534,7 +538,8 @@ namespace Cysharp.Threading.Tasks
         sealed class DelayIgnoreTimeScalePromise : IUniTaskSource, IPlayerLoopItem, ITaskPoolNode<DelayIgnoreTimeScalePromise>
         {
             static TaskPool<DelayIgnoreTimeScalePromise> pool;
-            public DelayIgnoreTimeScalePromise NextNode { get; set; }
+            DelayIgnoreTimeScalePromise nextNode;
+            public ref DelayIgnoreTimeScalePromise NextNode => ref nextNode;
 
             static DelayIgnoreTimeScalePromise()
             {
@@ -644,7 +649,8 @@ namespace Cysharp.Threading.Tasks
         sealed class DelayRealtimePromise : IUniTaskSource, IPlayerLoopItem, ITaskPoolNode<DelayRealtimePromise>
         {
             static TaskPool<DelayRealtimePromise> pool;
-            public DelayRealtimePromise NextNode { get; set; }
+            DelayRealtimePromise nextNode;
+            public ref DelayRealtimePromise NextNode => ref nextNode;
 
             static DelayRealtimePromise()
             {
@@ -720,6 +726,12 @@ namespace Cysharp.Threading.Tasks
                     return false;
                 }
 
+                if (stopwatch.IsInvalid)
+                {
+                    core.TrySetResult(AsyncUnit.Default);
+                    return false;
+                }
+
                 if (stopwatch.ElapsedTicks >= delayTimeSpanTicks)
                 {
                     core.TrySetResult(AsyncUnit.Default);

src/UniTask/Assets/Plugins/UniTask/Runtime/UniTask.Factory.cs

@@ -341,10 +341,12 @@ namespace Cysharp.Threading.Tasks
             public UniTaskStatus GetStatus(short token)
             {
                 var f = Interlocked.Exchange(ref factory, null);
-                if (f == null) throw new InvalidOperationException("Can't call twice.");
+                if (f != null)
+                {
+                    task = f();
+                    awaiter = task.GetAwaiter();
+                }
 
-                task = f();
-                awaiter = task.GetAwaiter();
                 return task.Status;
             }
 
@@ -383,10 +385,12 @@ namespace Cysharp.Threading.Tasks
             public UniTaskStatus GetStatus(short token)
             {
                 var f = Interlocked.Exchange(ref factory, null);
-                if (f == null) throw new InvalidOperationException("Can't call twice.");
+                if (f != null)
+                {
+                    task = f();
+                    awaiter = task.GetAwaiter();
+                }
 
-                task = f();
-                awaiter = task.GetAwaiter();
                 return task.Status;
             }
 

src/UniTask/Assets/Plugins/UniTask/Runtime/UniTask.Run.cs

@@ -7,7 +7,11 @@ namespace Cysharp.Threading.Tasks
 {
     public partial struct UniTask
     {
-        /// <summary>Run action on the threadPool and return to main thread if configureAwait = true.</summary>
+        #region OBSOLETE_RUN
+
+        // Run is a confusing name, use only RunOnThreadPool in the future.
+
+        /// <summary>[Obsolete]recommend to use RunOnThreadPool(or UniTask.Void(async void), UniTask.Create(async UniTask)).</summary>
         public static async UniTask Run(Action action, bool configureAwait = true, CancellationToken cancellationToken = default)
         {
             cancellationToken.ThrowIfCancellationRequested();
@@ -35,7 +39,7 @@ namespace Cysharp.Threading.Tasks
             cancellationToken.ThrowIfCancellationRequested();
         }
 
-        /// <summary>Run action on the threadPool and return to main thread if configureAwait = true.</summary>
+        /// <summary>[Obsolete]recommend to use RunOnThreadPool(or UniTask.Void(async void), UniTask.Create(async UniTask)).</summary>
         public static async UniTask Run(Action<object> action, object state, bool configureAwait = true, CancellationToken cancellationToken = default)
         {
             cancellationToken.ThrowIfCancellationRequested();
@@ -63,7 +67,7 @@ namespace Cysharp.Threading.Tasks
             cancellationToken.ThrowIfCancellationRequested();
         }
 
-        /// <summary>Run action on the threadPool and return to main thread if configureAwait = true.</summary>
+        /// <summary>[Obsolete]recommend to use RunOnThreadPool(or UniTask.Void(async void), UniTask.Create(async UniTask)).</summary>
         public static async UniTask Run(Func<UniTask> action, bool configureAwait = true, CancellationToken cancellationToken = default)
         {
             cancellationToken.ThrowIfCancellationRequested();
@@ -91,7 +95,7 @@ namespace Cysharp.Threading.Tasks
             cancellationToken.ThrowIfCancellationRequested();
         }
 
-        /// <summary>Run action on the threadPool and return to main thread if configureAwait = true.</summary>
+        /// <summary>[Obsolete]recommend to use RunOnThreadPool(or UniTask.Void(async void), UniTask.Create(async UniTask)).</summary>
         public static async UniTask Run(Func<object, UniTask> action, object state, bool configureAwait = true, CancellationToken cancellationToken = default)
         {
             cancellationToken.ThrowIfCancellationRequested();
@@ -119,7 +123,7 @@ namespace Cysharp.Threading.Tasks
             cancellationToken.ThrowIfCancellationRequested();
         }
 
-        /// <summary>Run action on the threadPool and return to main thread if configureAwait = true.</summary>
+        /// <summary>[Obsolete]recommend to use RunOnThreadPool(or UniTask.Void(async void), UniTask.Create(async UniTask)).</summary>
         public static async UniTask<T> Run<T>(Func<T> func, bool configureAwait = true, CancellationToken cancellationToken = default)
         {
             cancellationToken.ThrowIfCancellationRequested();
@@ -146,7 +150,7 @@ namespace Cysharp.Threading.Tasks
             }
         }
 
-        /// <summary>Run action on the threadPool and return to main thread if configureAwait = true.</summary>
+        /// <summary>[Obsolete]recommend to use RunOnThreadPool(or UniTask.Void(async void), UniTask.Create(async UniTask)).</summary>
         public static async UniTask<T> Run<T>(Func<UniTask<T>> func, bool configureAwait = true, CancellationToken cancellationToken = default)
         {
             cancellationToken.ThrowIfCancellationRequested();
@@ -176,7 +180,7 @@ namespace Cysharp.Threading.Tasks
             }
         }
 
-        /// <summary>Run action on the threadPool and return to main thread if configureAwait = true.</summary>
+        /// <summary>[Obsolete]recommend to use RunOnThreadPool(or UniTask.Void(async void), UniTask.Create(async UniTask)).</summary>
         public static async UniTask<T> Run<T>(Func<object, T> func, object state, bool configureAwait = true, CancellationToken cancellationToken = default)
         {
             cancellationToken.ThrowIfCancellationRequested();
@@ -203,7 +207,7 @@ namespace Cysharp.Threading.Tasks
             }
         }
 
-        /// <summary>Run action on the threadPool and return to main thread if configureAwait = true.</summary>
+        /// <summary>[Obsolete]recommend to use RunOnThreadPool(or UniTask.Void(async void), UniTask.Create(async UniTask)).</summary>
         public static async UniTask<T> Run<T>(Func<object, UniTask<T>> func, object state, bool configureAwait = true, CancellationToken cancellationToken = default)
         {
             cancellationToken.ThrowIfCancellationRequested();
@@ -232,6 +236,235 @@ namespace Cysharp.Threading.Tasks
                 return result;
             }
         }
+
+        #endregion
+
+
+        /// <summary>Run action on the threadPool and return to main thread if configureAwait = true.</summary>
+        public static async UniTask RunOnThreadPool(Action action, bool configureAwait = true, CancellationToken cancellationToken = default)
+        {
+            cancellationToken.ThrowIfCancellationRequested();
+
+            await UniTask.SwitchToThreadPool();
+
+            cancellationToken.ThrowIfCancellationRequested();
+
+            if (configureAwait)
+            {
+                try
+                {
+                    action();
+                }
+                finally
+                {
+                    await UniTask.Yield();
+                }
+            }
+            else
+            {
+                action();
+            }
+
+            cancellationToken.ThrowIfCancellationRequested();
+        }
+
+        /// <summary>Run action on the threadPool and return to main thread if configureAwait = true.</summary>
+        public static async UniTask RunOnThreadPool(Action<object> action, object state, bool configureAwait = true, CancellationToken cancellationToken = default)
+        {
+            cancellationToken.ThrowIfCancellationRequested();
+
+            await UniTask.SwitchToThreadPool();
+
+            cancellationToken.ThrowIfCancellationRequested();
+
+            if (configureAwait)
+            {
+                try
+                {
+                    action(state);
+                }
+                finally
+                {
+                    await UniTask.Yield();
+                }
+            }
+            else
+            {
+                action(state);
+            }
+
+            cancellationToken.ThrowIfCancellationRequested();
+        }
+
+        /// <summary>Run action on the threadPool and return to main thread if configureAwait = true.</summary>
+        public static async UniTask RunOnThreadPool(Func<UniTask> action, bool configureAwait = true, CancellationToken cancellationToken = default)
+        {
+            cancellationToken.ThrowIfCancellationRequested();
+
+            await UniTask.SwitchToThreadPool();
+
+            cancellationToken.ThrowIfCancellationRequested();
+
+            if (configureAwait)
+            {
+                try
+                {
+                    await action();
+                }
+                finally
+                {
+                    await UniTask.Yield();
+                }
+            }
+            else
+            {
+                await action();
+            }
+
+            cancellationToken.ThrowIfCancellationRequested();
+        }
+
+        /// <summary>Run action on the threadPool and return to main thread if configureAwait = true.</summary>
+        public static async UniTask RunOnThreadPool(Func<object, UniTask> action, object state, bool configureAwait = true, CancellationToken cancellationToken = default)
+        {
+            cancellationToken.ThrowIfCancellationRequested();
+
+            await UniTask.SwitchToThreadPool();
+
+            cancellationToken.ThrowIfCancellationRequested();
+
+            if (configureAwait)
+            {
+                try
+                {
+                    await action(state);
+                }
+                finally
+                {
+                    await UniTask.Yield();
+                }
+            }
+            else
+            {
+                await action(state);
+            }
+
+            cancellationToken.ThrowIfCancellationRequested();
+        }
+
+        /// <summary>Run action on the threadPool and return to main thread if configureAwait = true.</summary>
+        public static async UniTask<T> RunOnThreadPool<T>(Func<T> func, bool configureAwait = true, CancellationToken cancellationToken = default)
+        {
+            cancellationToken.ThrowIfCancellationRequested();
+
+            await UniTask.SwitchToThreadPool();
+
+            cancellationToken.ThrowIfCancellationRequested();
+
+            if (configureAwait)
+            {
+                try
+                {
+                    return func();
+                }
+                finally
+                {
+                    await UniTask.Yield();
+                    cancellationToken.ThrowIfCancellationRequested();
+                }
+            }
+            else
+            {
+                return func();
+            }
+        }
+
+        /// <summary>Run action on the threadPool and return to main thread if configureAwait = true.</summary>
+        public static async UniTask<T> RunOnThreadPool<T>(Func<UniTask<T>> func, bool configureAwait = true, CancellationToken cancellationToken = default)
+        {
+            cancellationToken.ThrowIfCancellationRequested();
+
+            await UniTask.SwitchToThreadPool();
+
+            cancellationToken.ThrowIfCancellationRequested();
+
+            if (configureAwait)
+            {
+                try
+                {
+                    return await func();
+                }
+                finally
+                {
+                    cancellationToken.ThrowIfCancellationRequested();
+                    await UniTask.Yield();
+                    cancellationToken.ThrowIfCancellationRequested();
+                }
+            }
+            else
+            {
+                var result = await func();
+                cancellationToken.ThrowIfCancellationRequested();
+                return result;
+            }
+        }
+
+        /// <summary>Run action on the threadPool and return to main thread if configureAwait = true.</summary>
+        public static async UniTask<T> RunOnThreadPool<T>(Func<object, T> func, object state, bool configureAwait = true, CancellationToken cancellationToken = default)
+        {
+            cancellationToken.ThrowIfCancellationRequested();
+
+            await UniTask.SwitchToThreadPool();
+
+            cancellationToken.ThrowIfCancellationRequested();
+
+            if (configureAwait)
+            {
+                try
+                {
+                    return func(state);
+                }
+                finally
+                {
+                    await UniTask.Yield();
+                    cancellationToken.ThrowIfCancellationRequested();
+                }
+            }
+            else
+            {
+                return func(state);
+            }
+        }
+
+        /// <summary>Run action on the threadPool and return to main thread if configureAwait = true.</summary>
+        public static async UniTask<T> RunOnThreadPool<T>(Func<object, UniTask<T>> func, object state, bool configureAwait = true, CancellationToken cancellationToken = default)
+        {
+            cancellationToken.ThrowIfCancellationRequested();
+
+            await UniTask.SwitchToThreadPool();
+
+            cancellationToken.ThrowIfCancellationRequested();
+
+            if (configureAwait)
+            {
+                try
+                {
+                    return await func(state);
+                }
+                finally
+                {
+                    cancellationToken.ThrowIfCancellationRequested();
+                    await UniTask.Yield();
+                    cancellationToken.ThrowIfCancellationRequested();
+                }
+            }
+            else
+            {
+                var result = await func(state);
+                cancellationToken.ThrowIfCancellationRequested();
+                return result;
+            }
+        }
     }
 }
 

src/UniTask/Assets/Plugins/UniTask/Runtime/UniTask.Threading.cs

@@ -224,7 +224,8 @@ namespace Cysharp.Threading.Tasks
         sealed class ThreadPoolWorkItem : IThreadPoolWorkItem, ITaskPoolNode<ThreadPoolWorkItem>
         {
             static TaskPool<ThreadPoolWorkItem> pool;
-            public ThreadPoolWorkItem NextNode { get; set; }
+            ThreadPoolWorkItem nextNode;
+            public ref ThreadPoolWorkItem NextNode => ref nextNode;
 
             static ThreadPoolWorkItem()
             {

src/UniTask/Assets/Plugins/UniTask/Runtime/UniTask.WaitUntil.cs

@@ -38,7 +38,8 @@ namespace Cysharp.Threading.Tasks
         sealed class WaitUntilPromise : IUniTaskSource, IPlayerLoopItem, ITaskPoolNode<WaitUntilPromise>
         {
             static TaskPool<WaitUntilPromise> pool;
-            public WaitUntilPromise NextNode { get; set; }
+            WaitUntilPromise nextNode;
+            public ref WaitUntilPromise NextNode => ref nextNode;
 
             static WaitUntilPromise()
             {
@@ -142,7 +143,8 @@ namespace Cysharp.Threading.Tasks
         sealed class WaitWhilePromise : IUniTaskSource, IPlayerLoopItem, ITaskPoolNode<WaitWhilePromise>
         {
             static TaskPool<WaitWhilePromise> pool;
-            public WaitWhilePromise NextNode { get; set; }
+            WaitWhilePromise nextNode;
+            public ref WaitWhilePromise NextNode => ref nextNode;
 
             static WaitWhilePromise()
             {
@@ -246,7 +248,8 @@ namespace Cysharp.Threading.Tasks
         sealed class WaitUntilCanceledPromise : IUniTaskSource, IPlayerLoopItem, ITaskPoolNode<WaitUntilCanceledPromise>
         {
             static TaskPool<WaitUntilCanceledPromise> pool;
-            public WaitUntilCanceledPromise NextNode { get; set; }
+            WaitUntilCanceledPromise nextNode;
+            public ref WaitUntilCanceledPromise NextNode => ref nextNode;
 
             static WaitUntilCanceledPromise()
             {
@@ -334,7 +337,8 @@ namespace Cysharp.Threading.Tasks
         sealed class WaitUntilValueChangedUnityObjectPromise<T, U> : IUniTaskSource<U>, IPlayerLoopItem, ITaskPoolNode<WaitUntilValueChangedUnityObjectPromise<T, U>>
         {
             static TaskPool<WaitUntilValueChangedUnityObjectPromise<T, U>> pool;
-            public WaitUntilValueChangedUnityObjectPromise<T, U> NextNode { get; set; }
+            WaitUntilValueChangedUnityObjectPromise<T, U> nextNode;
+            public ref WaitUntilValueChangedUnityObjectPromise<T, U> NextNode => ref nextNode;
 
             static WaitUntilValueChangedUnityObjectPromise()
             {
@@ -457,7 +461,8 @@ namespace Cysharp.Threading.Tasks
             where T : class
         {
             static TaskPool<WaitUntilValueChangedStandardObjectPromise<T, U>> pool;
-            public WaitUntilValueChangedStandardObjectPromise<T, U> NextNode { get; set; }
+            WaitUntilValueChangedStandardObjectPromise<T, U> nextNode;
+            public ref WaitUntilValueChangedStandardObjectPromise<T, U> NextNode => ref nextNode;
 
             static WaitUntilValueChangedStandardObjectPromise()
             {

src/UniTask/Assets/Plugins/UniTask/Runtime/UniTask.asmdef

@@ -1,7 +1,7 @@
 {
     "name": "UniTask",
-    "references": [
-    ],
+    "rootNamespace": "",
+    "references": [],
     "includePlatforms": [],
     "excludePlatforms": [],
     "allowUnsafeCode": false,
@@ -10,6 +10,36 @@
     "autoReferenced": true,
     "defineConstraints": [],
     "versionDefines": [
+        {
+            "name": "com.unity.modules.assetbundle",
+            "expression": "",
+            "define": "UNITASK_ASSETBUNDLE_SUPPORT"
+        },
+        {
+            "name": "com.unity.modules.physics",
+            "expression": "",
+            "define": "UNITASK_PHYSICS_SUPPORT"
+        },
+        {
+            "name": "com.unity.modules.physics2d",
+            "expression": "",
+            "define": "UNITASK_PHYSICS2D_SUPPORT"
+        },
+        {
+            "name": "com.unity.modules.particlesystem",
+            "expression": "",
+            "define": "UNITASK_PARTICLESYSTEM_SUPPORT"
+        },
+        {
+            "name": "com.unity.ugui",
+            "expression": "",
+            "define": "UNITASK_UGUI_SUPPORT"
+        },
+        {
+            "name": "com.unity.modules.unitywebrequest",
+            "expression": "",
+            "define": "UNITASK_WEBREQUEST_SUPPORT"
+        }
     ],
     "noEngineReferences": false
 }

src/UniTask/Assets/Plugins/UniTask/Runtime/UniTask.cs

@@ -115,8 +115,13 @@ namespace Cysharp.Threading.Tasks
             var status = this.source.GetStatus(this.token);
             if (status.IsCompletedSuccessfully())
             {
+                this.source.GetResult(this.token);
                 return CompletedTasks.AsyncUnit;
             }
+            else if(this.source is IUniTaskSource<AsyncUnit> asyncUnitSource)
+            {
+                return new UniTask<AsyncUnit>(asyncUnitSource, this.token);
+            }
 
             return new UniTask<AsyncUnit>(new AsyncUnitSource(this.source), this.token);
         }
@@ -422,6 +427,7 @@ namespace Cysharp.Threading.Tasks
             var status = this.source.GetStatus(this.token);
             if (status.IsCompletedSuccessfully())
             {
+                this.source.GetResult(this.token);
                 return UniTask.CompletedTask;
             }
 

src/UniTask/Assets/Plugins/UniTask/Runtime/UniTaskCompletionSource.cs

@@ -319,7 +319,8 @@ namespace Cysharp.Threading.Tasks
     public class AutoResetUniTaskCompletionSource : IUniTaskSource, ITaskPoolNode<AutoResetUniTaskCompletionSource>, IPromise
     {
         static TaskPool<AutoResetUniTaskCompletionSource> pool;
-        public AutoResetUniTaskCompletionSource NextNode { get; set; }
+        AutoResetUniTaskCompletionSource nextNode;
+        public ref AutoResetUniTaskCompletionSource NextNode => ref nextNode;
 
         static AutoResetUniTaskCompletionSource()
         {
@@ -441,7 +442,8 @@ namespace Cysharp.Threading.Tasks
     public class AutoResetUniTaskCompletionSource<T> : IUniTaskSource<T>, ITaskPoolNode<AutoResetUniTaskCompletionSource<T>>, IPromise<T>
     {
         static TaskPool<AutoResetUniTaskCompletionSource<T>> pool;
-        public AutoResetUniTaskCompletionSource<T> NextNode { get; set; }
+        AutoResetUniTaskCompletionSource<T> nextNode;
+        public ref AutoResetUniTaskCompletionSource<T> NextNode => ref nextNode;
 
         static AutoResetUniTaskCompletionSource()
         {

src/UniTask/Assets/Plugins/UniTask/Runtime/UniTaskExtensions.cs

@@ -189,6 +189,174 @@ namespace Cysharp.Threading.Tasks
             return new AsyncLazy<T>(task);
         }
 
+        /// <summary>
+        /// Ignore task result when cancel raised first.
+        /// </summary>
+        public static UniTask WithCancellation(this UniTask task, CancellationToken cancellationToken)
+        {
+            if (!cancellationToken.CanBeCanceled)
+            {
+                return task;
+            }
+
+            if (cancellationToken.IsCancellationRequested)
+            {
+                return UniTask.FromCanceled(cancellationToken);
+            }
+
+            if (task.Status.IsCompleted())
+            {
+                return task;
+            }
+
+            return new UniTask(new WithCancellationSource(task, cancellationToken), 0);
+        }
+
+        /// <summary>
+        /// Ignore task result when cancel raised first.
+        /// </summary>
+        public static UniTask<T> WithCancellation<T>(this UniTask<T> task, CancellationToken cancellationToken)
+        {
+            if (!cancellationToken.CanBeCanceled)
+            {
+                return task;
+            }
+
+            if (cancellationToken.IsCancellationRequested)
+            {
+                return UniTask.FromCanceled<T>(cancellationToken);
+            }
+
+            if (task.Status.IsCompleted())
+            {
+                return task;
+            }
+
+            return new UniTask<T>(new WithCancellationSource<T>(task, cancellationToken), 0);
+        }
+
+        sealed class WithCancellationSource : IUniTaskSource
+        {
+            static readonly Action<object> cancellationCallbackDelegate = CancellationCallback;
+
+            CancellationToken cancellationToken;
+            CancellationTokenRegistration tokenRegistration;
+            UniTaskCompletionSourceCore<AsyncUnit> core;
+
+            public WithCancellationSource(UniTask task, CancellationToken cancellationToken)
+            {
+                this.cancellationToken = cancellationToken;
+                this.tokenRegistration = cancellationToken.RegisterWithoutCaptureExecutionContext(cancellationCallbackDelegate, this);
+                RunTask(task).Forget();
+            }
+
+            async UniTaskVoid RunTask(UniTask task)
+            {
+                try
+                {
+                    await task;
+                    core.TrySetResult(AsyncUnit.Default);
+                }
+                catch (Exception ex)
+                {
+                    core.TrySetException(ex);
+                }
+                finally
+                {
+                    tokenRegistration.Dispose();
+                }
+            }
+
+            static void CancellationCallback(object state)
+            {
+                var self = (WithCancellationSource)state;
+                self.core.TrySetCanceled(self.cancellationToken);
+            }
+
+            public void GetResult(short token)
+            {
+                core.GetResult(token);
+            }
+
+            public UniTaskStatus GetStatus(short token)
+            {
+                return core.GetStatus(token);
+            }
+
+            public void OnCompleted(Action<object> continuation, object state, short token)
+            {
+                core.OnCompleted(continuation, state, token);
+            }
+
+            public UniTaskStatus UnsafeGetStatus()
+            {
+                return core.UnsafeGetStatus();
+            }
+        }
+
+        sealed class WithCancellationSource<T> : IUniTaskSource<T>
+        {
+            static readonly Action<object> cancellationCallbackDelegate = CancellationCallback;
+
+            CancellationToken cancellationToken;
+            CancellationTokenRegistration tokenRegistration;
+            UniTaskCompletionSourceCore<T> core;
+
+            public WithCancellationSource(UniTask<T> task, CancellationToken cancellationToken)
+            {
+                this.cancellationToken = cancellationToken;
+                this.tokenRegistration = cancellationToken.RegisterWithoutCaptureExecutionContext(cancellationCallbackDelegate, this);
+                RunTask(task).Forget();
+            }
+
+            async UniTaskVoid RunTask(UniTask<T> task)
+            {
+                try
+                {
+                    core.TrySetResult(await task);
+                }
+                catch (Exception ex)
+                {
+                    core.TrySetException(ex);
+                }
+                finally
+                {
+                    tokenRegistration.Dispose();
+                }
+            }
+
+            static void CancellationCallback(object state)
+            {
+                var self = (WithCancellationSource<T>)state;
+                self.core.TrySetCanceled(self.cancellationToken);
+            }
+
+            void IUniTaskSource.GetResult(short token)
+            {
+                core.GetResult(token);
+            }
+
+            public T GetResult(short token)
+            {
+                return core.GetResult(token);
+            }
+
+            public UniTaskStatus GetStatus(short token)
+            {
+                return core.GetStatus(token);
+            }
+
+            public void OnCompleted(Action<object> continuation, object state, short token)
+            {
+                core.OnCompleted(continuation, state, token);
+            }
+
+            public UniTaskStatus UnsafeGetStatus()
+            {
+                return core.UnsafeGetStatus();
+            }
+        }
+
 #if UNITY_2018_3_OR_NEWER
 
         public static IEnumerator ToCoroutine<T>(this UniTask<T> task, Action<T> resultHandler = null, Action<Exception> exceptionHandler = null)
@@ -393,21 +561,23 @@ namespace Cysharp.Threading.Tasks
                     UniTaskScheduler.PublishUnobservedTaskException(ex);
                 }
             }
-
-            awaiter.SourceOnCompleted(state =>
+            else
             {
-                using (var t = (StateTuple<UniTask.Awaiter>)state)
+                awaiter.SourceOnCompleted(state =>
                 {
-                    try
+                    using (var t = (StateTuple<UniTask.Awaiter>)state)
                     {
-                        t.Item1.GetResult();
+                        try
+                        {
+                            t.Item1.GetResult();
+                        }
+                        catch (Exception ex)
+                        {
+                            UniTaskScheduler.PublishUnobservedTaskException(ex);
+                        }
                     }
-                    catch (Exception ex)
-                    {
-                        UniTaskScheduler.PublishUnobservedTaskException(ex);
-                    }
-                }
-            }, StateTuple.Create(awaiter));
+                }, StateTuple.Create(awaiter));
+            }
         }
 
         public static void Forget(this UniTask task, Action<Exception> exceptionHandler, bool handleExceptionOnMainThread = true)
@@ -461,21 +631,23 @@ namespace Cysharp.Threading.Tasks
                     UniTaskScheduler.PublishUnobservedTaskException(ex);
                 }
             }
-
-            awaiter.SourceOnCompleted(state =>
+            else
             {
-                using (var t = (StateTuple<UniTask<T>.Awaiter>)state)
+                awaiter.SourceOnCompleted(state =>
                 {
-                    try
+                    using (var t = (StateTuple<UniTask<T>.Awaiter>)state)
                     {
-                        t.Item1.GetResult();
+                        try
+                        {
+                            t.Item1.GetResult();
+                        }
+                        catch (Exception ex)
+                        {
+                            UniTaskScheduler.PublishUnobservedTaskException(ex);
+                        }
                     }
-                    catch (Exception ex)
-                    {
-                        UniTaskScheduler.PublishUnobservedTaskException(ex);
-                    }
-                }
-            }, StateTuple.Create(awaiter));
+                }, StateTuple.Create(awaiter));
+            }
         }
 
         public static void Forget<T>(this UniTask<T> task, Action<Exception> exceptionHandler, bool handleExceptionOnMainThread = true)
@@ -564,11 +736,51 @@ namespace Cysharp.Threading.Tasks
             return await await task;
         }
 
-        public static async UniTask Unwrap<T>(this UniTask<UniTask> task)
+        public static async UniTask Unwrap(this UniTask<UniTask> task)
         {
             await await task;
         }
 
+        public static async UniTask<T> Unwrap<T>(this Task<UniTask<T>> task)
+        {
+            return await await task;
+        }
+
+        public static async UniTask<T> Unwrap<T>(this Task<UniTask<T>> task, bool continueOnCapturedContext)
+        {
+            return await await task.ConfigureAwait(continueOnCapturedContext);
+        }
+
+        public static async UniTask Unwrap(this Task<UniTask> task)
+        {
+            await await task;
+        }
+
+        public static async UniTask Unwrap(this Task<UniTask> task, bool continueOnCapturedContext)
+        {
+            await await task.ConfigureAwait(continueOnCapturedContext);
+        }
+
+        public static async UniTask<T> Unwrap<T>(this UniTask<Task<T>> task)
+        {
+            return await await task;
+        }
+
+        public static async UniTask<T> Unwrap<T>(this UniTask<Task<T>> task, bool continueOnCapturedContext)
+        {
+            return await (await task).ConfigureAwait(continueOnCapturedContext);
+        }
+
+        public static async UniTask Unwrap(this UniTask<Task> task)
+        {
+            await await task;
+        }
+
+        public static async UniTask Unwrap(this UniTask<Task> task, bool continueOnCapturedContext)
+        {
+            await (await task).ConfigureAwait(continueOnCapturedContext);
+        }
+
 #if UNITY_2018_3_OR_NEWER
 
         sealed class ToCoroutineEnumerator : IEnumerator

src/UniTask/Assets/Plugins/UniTask/Runtime/UniTaskSynchronizationContext.cs

@@ -0,0 +1,158 @@
+using System;
+using System.Runtime.InteropServices;
+using System.Threading;
+
+namespace Cysharp.Threading.Tasks
+{
+    public class UniTaskSynchronizationContext : SynchronizationContext
+    {
+        const int MaxArrayLength = 0X7FEFFFFF;
+        const int InitialSize = 16;
+
+        static SpinLock gate = new SpinLock(false);
+        static bool dequing = false;
+
+        static int actionListCount = 0;
+        static Callback[] actionList = new Callback[InitialSize];
+
+        static int waitingListCount = 0;
+        static Callback[] waitingList = new Callback[InitialSize];
+
+        static int opCount;
+
+        public override void Send(SendOrPostCallback d, object state)
+        {
+            d(state);
+        }
+
+        public override void Post(SendOrPostCallback d, object state)
+        {
+            bool lockTaken = false;
+            try
+            {
+                gate.Enter(ref lockTaken);
+
+                if (dequing)
+                {
+                    // Ensure Capacity
+                    if (waitingList.Length == waitingListCount)
+                    {
+                        var newLength = waitingListCount * 2;
+                        if ((uint)newLength > MaxArrayLength) newLength = MaxArrayLength;
+
+                        var newArray = new Callback[newLength];
+                        Array.Copy(waitingList, newArray, waitingListCount);
+                        waitingList = newArray;
+                    }
+                    waitingList[waitingListCount] = new Callback(d, state);
+                    waitingListCount++;
+                }
+                else
+                {
+                    // Ensure Capacity
+                    if (actionList.Length == actionListCount)
+                    {
+                        var newLength = actionListCount * 2;
+                        if ((uint)newLength > MaxArrayLength) newLength = MaxArrayLength;
+
+                        var newArray = new Callback[newLength];
+                        Array.Copy(actionList, newArray, actionListCount);
+                        actionList = newArray;
+                    }
+                    actionList[actionListCount] = new Callback(d, state);
+                    actionListCount++;
+                }
+            }
+            finally
+            {
+                if (lockTaken) gate.Exit(false);
+            }
+        }
+
+        public override void OperationStarted()
+        {
+            Interlocked.Increment(ref opCount);
+        }
+
+        public override void OperationCompleted()
+        {
+            Interlocked.Decrement(ref opCount);
+        }
+
+        public override SynchronizationContext CreateCopy()
+        {
+            return this;
+        }
+
+        // delegate entrypoint.
+        internal static void Run()
+        {
+            {
+                bool lockTaken = false;
+                try
+                {
+                    gate.Enter(ref lockTaken);
+                    if (actionListCount == 0) return;
+                    dequing = true;
+                }
+                finally
+                {
+                    if (lockTaken) gate.Exit(false);
+                }
+            }
+
+            for (int i = 0; i < actionListCount; i++)
+            {
+                var action = actionList[i];
+                actionList[i] = default;
+                action.Invoke();
+            }
+
+            {
+                bool lockTaken = false;
+                try
+                {
+                    gate.Enter(ref lockTaken);
+                    dequing = false;
+
+                    var swapTempActionList = actionList;
+
+                    actionListCount = waitingListCount;
+                    actionList = waitingList;
+
+                    waitingListCount = 0;
+                    waitingList = swapTempActionList;
+                }
+                finally
+                {
+                    if (lockTaken) gate.Exit(false);
+                }
+            }
+        }
+
+        [StructLayout(LayoutKind.Auto)]
+        readonly struct Callback
+        {
+            readonly SendOrPostCallback callback;
+            readonly object state;
+
+            public Callback(SendOrPostCallback callback, object state)
+            {
+                this.callback = callback;
+                this.state = state;
+            }
+
+            public void Invoke()
+            {
+                try
+                {
+                    callback(state);
+                }
+                catch (Exception ex)
+                {
+                    UnityEngine.Debug.LogException(ex);
+                }
+            }
+        }
+    }
+}

src/UniTask/Assets/Plugins/UniTask/Runtime/UniTaskSynchronizationContext.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: abf3aae9813db2849bce518f8596e920
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

src/UniTask/Assets/Plugins/UniTask/Runtime/UnityAsyncExtensions.AssetBundleRequestAllAssets.cs

@@ -0,0 +1,324 @@
+#pragma warning disable CS1591 // Missing XML comment for publicly visible type or member
+
+#if UNITY_2018_4 || UNITY_2019_4_OR_NEWER
+#if UNITASK_ASSETBUNDLE_SUPPORT
+
+using Cysharp.Threading.Tasks.Internal;
+using System;
+using System.Runtime.CompilerServices;
+using System.Threading;
+using UnityEngine;
+
+namespace Cysharp.Threading.Tasks
+{
+    public static partial class UnityAsyncExtensions
+    {
+        public static AssetBundleRequestAllAssetsAwaiter AwaitForAllAssets(this AssetBundleRequest asyncOperation)
+        {
+            Error.ThrowArgumentNullException(asyncOperation, nameof(asyncOperation));
+            return new AssetBundleRequestAllAssetsAwaiter(asyncOperation);
+        }
+
+        public static UniTask<UnityEngine.Object[]> AwaitForAllAssets(this AssetBundleRequest asyncOperation, CancellationToken cancellationToken)
+        {
+            Error.ThrowArgumentNullException(asyncOperation, nameof(asyncOperation));
+            if (cancellationToken.IsCancellationRequested) return UniTask.FromCanceled<UnityEngine.Object[]>(cancellationToken);
+            if (asyncOperation.isDone) return UniTask.FromResult<UnityEngine.Object[]>(asyncOperation.allAssets);
+            return new UniTask<UnityEngine.Object[]>(AssetBundleRequestAllAssetsWithCancellationSource.Create(asyncOperation, cancellationToken, out var token), token);
+        }
+
+        public static UniTask<UnityEngine.Object[]> AwaitForAllAssets(this AssetBundleRequest asyncOperation, IProgress<float> progress = null, PlayerLoopTiming timing = PlayerLoopTiming.Update, CancellationToken cancellationToken = default(CancellationToken))
+        {
+            Error.ThrowArgumentNullException(asyncOperation, nameof(asyncOperation));
+            if (cancellationToken.IsCancellationRequested) return UniTask.FromCanceled<UnityEngine.Object[]>(cancellationToken);
+            if (asyncOperation.isDone) return UniTask.FromResult(asyncOperation.allAssets);
+            return new UniTask<UnityEngine.Object[]>(AssetBundleRequestAllAssetsConfiguredSource.Create(asyncOperation, timing, progress, cancellationToken, out var token), token);
+        }
+
+        public struct AssetBundleRequestAllAssetsAwaiter : ICriticalNotifyCompletion
+        {
+            AssetBundleRequest asyncOperation;
+            Action<AsyncOperation> continuationAction;
+
+            public AssetBundleRequestAllAssetsAwaiter(AssetBundleRequest asyncOperation)
+            {
+                this.asyncOperation = asyncOperation;
+                this.continuationAction = null;
+            }
+
+            public AssetBundleRequestAllAssetsAwaiter GetAwaiter()
+            {
+                return this;
+            }
+
+            public bool IsCompleted => asyncOperation.isDone;
+
+            public UnityEngine.Object[] GetResult()
+            {
+                if (continuationAction != null)
+                {
+                    asyncOperation.completed -= continuationAction;
+                    continuationAction = null;
+                    var result = asyncOperation.allAssets;
+                    asyncOperation = null;
+                    return result;
+                }
+                else
+                {
+                    var result = asyncOperation.allAssets;
+                    asyncOperation = null;
+                    return result;
+                }
+            }
+
+            public void OnCompleted(Action continuation)
+            {
+                UnsafeOnCompleted(continuation);
+            }
+
+            public void UnsafeOnCompleted(Action continuation)
+            {
+                Error.ThrowWhenContinuationIsAlreadyRegistered(continuationAction);
+                continuationAction = PooledDelegate<AsyncOperation>.Create(continuation);
+                asyncOperation.completed += continuationAction;
+            }
+        }
+
+        sealed class AssetBundleRequestAllAssetsWithCancellationSource : IUniTaskSource<UnityEngine.Object[]>, IPlayerLoopItem, ITaskPoolNode<AssetBundleRequestAllAssetsWithCancellationSource>
+        {
+            static TaskPool<AssetBundleRequestAllAssetsWithCancellationSource> pool;
+            AssetBundleRequestAllAssetsWithCancellationSource nextNode;
+            public ref AssetBundleRequestAllAssetsWithCancellationSource NextNode => ref nextNode;
+
+            static AssetBundleRequestAllAssetsWithCancellationSource()
+            {
+                TaskPool.RegisterSizeGetter(typeof(AssetBundleRequestAllAssetsWithCancellationSource), () => pool.Size);
+            }
+
+            readonly Action<AsyncOperation> continuationAction;
+            AssetBundleRequest asyncOperation;
+            CancellationToken cancellationToken;
+            bool completed;
+
+            UniTaskCompletionSourceCore<UnityEngine.Object[]> core;
+
+            AssetBundleRequestAllAssetsWithCancellationSource()
+            {
+                continuationAction = Continuation;
+            }
+
+            public static IUniTaskSource<UnityEngine.Object[]> Create(AssetBundleRequest asyncOperation, CancellationToken cancellationToken, out short token)
+            {
+                if (cancellationToken.IsCancellationRequested)
+                {
+                    return AutoResetUniTaskCompletionSource<UnityEngine.Object[]>.CreateFromCanceled(cancellationToken, out token);
+                }
+
+                if (!pool.TryPop(out var result))
+                {
+                    result = new AssetBundleRequestAllAssetsWithCancellationSource();
+                }
+
+                result.asyncOperation = asyncOperation;
+                result.cancellationToken = cancellationToken;
+                result.completed = false;
+
+                TaskTracker.TrackActiveTask(result, 3);
+
+                PlayerLoopHelper.AddAction(PlayerLoopTiming.Update, result);
+
+                asyncOperation.completed += result.continuationAction;
+
+                token = result.core.Version;
+                return result;
+            }
+
+            void Continuation(AsyncOperation _)
+            {
+                asyncOperation.completed -= continuationAction;
+
+                if (completed)
+                {
+                    TryReturn();
+                }
+                else
+                {
+                    completed = true;
+                    if (cancellationToken.IsCancellationRequested)
+                    {
+                        core.TrySetCanceled(cancellationToken);
+                        return;
+                    }
+
+                    core.TrySetResult(asyncOperation.allAssets);
+                }
+            }
+
+            public UnityEngine.Object[] GetResult(short token)
+            {
+                return core.GetResult(token);
+            }
+
+            void IUniTaskSource.GetResult(short token)
+            {
+                GetResult(token);
+            }
+
+            public UniTaskStatus GetStatus(short token)
+            {
+                return core.GetStatus(token);
+            }
+
+            public UniTaskStatus UnsafeGetStatus()
+            {
+                return core.UnsafeGetStatus();
+            }
+
+            public void OnCompleted(Action<object> continuation, object state, short token)
+            {
+                core.OnCompleted(continuation, state, token);
+            }
+
+            public bool MoveNext()
+            {
+                if (completed)
+                {
+                    TryReturn();
+                    return false;
+                }
+
+                if (cancellationToken.IsCancellationRequested)
+                {
+                    completed = true;
+                    core.TrySetCanceled(cancellationToken);
+                    return false;
+                }
+
+                return true;
+            }
+
+            bool TryReturn()
+            {
+                TaskTracker.RemoveTracking(this);
+                core.Reset();
+                asyncOperation = default;
+                cancellationToken = default;
+                return pool.TryPush(this);
+            }
+        }
+
+        sealed class AssetBundleRequestAllAssetsConfiguredSource : IUniTaskSource<UnityEngine.Object[]>, IPlayerLoopItem, ITaskPoolNode<AssetBundleRequestAllAssetsConfiguredSource>
+        {
+            static TaskPool<AssetBundleRequestAllAssetsConfiguredSource> pool;
+            AssetBundleRequestAllAssetsConfiguredSource nextNode;
+            public ref AssetBundleRequestAllAssetsConfiguredSource NextNode => ref nextNode;
+
+            static AssetBundleRequestAllAssetsConfiguredSource()
+            {
+                TaskPool.RegisterSizeGetter(typeof(AssetBundleRequestAllAssetsConfiguredSource), () => pool.Size);
+            }
+
+            AssetBundleRequest asyncOperation;
+            IProgress<float> progress;
+            CancellationToken cancellationToken;
+
+            UniTaskCompletionSourceCore<UnityEngine.Object[]> core;
+
+            AssetBundleRequestAllAssetsConfiguredSource()
+            {
+
+            }
+
+            public static IUniTaskSource<UnityEngine.Object[]> Create(AssetBundleRequest asyncOperation, PlayerLoopTiming timing, IProgress<float> progress, CancellationToken cancellationToken, out short token)
+            {
+                if (cancellationToken.IsCancellationRequested)
+                {
+                    return AutoResetUniTaskCompletionSource<UnityEngine.Object[]>.CreateFromCanceled(cancellationToken, out token);
+                }
+
+                if (!pool.TryPop(out var result))
+                {
+                    result = new AssetBundleRequestAllAssetsConfiguredSource();
+                }
+
+                result.asyncOperation = asyncOperation;
+                result.progress = progress;
+                result.cancellationToken = cancellationToken;
+
+                TaskTracker.TrackActiveTask(result, 3);
+
+                PlayerLoopHelper.AddAction(timing, result);
+
+                token = result.core.Version;
+                return result;
+            }
+
+            public UnityEngine.Object[] GetResult(short token)
+            {
+                try
+                {
+                    return core.GetResult(token);
+                }
+                finally
+                {
+                    TryReturn();
+                }
+            }
+
+            void IUniTaskSource.GetResult(short token)
+            {
+                GetResult(token);
+            }
+
+            public UniTaskStatus GetStatus(short token)
+            {
+                return core.GetStatus(token);
+            }
+
+            public UniTaskStatus UnsafeGetStatus()
+            {
+                return core.UnsafeGetStatus();
+            }
+
+            public void OnCompleted(Action<object> continuation, object state, short token)
+            {
+                core.OnCompleted(continuation, state, token);
+            }
+
+            public bool MoveNext()
+            {
+                if (cancellationToken.IsCancellationRequested)
+                {
+                    core.TrySetCanceled(cancellationToken);
+                    return false;
+                }
+
+                if (progress != null)
+                {
+                    progress.Report(asyncOperation.progress);
+                }
+
+                if (asyncOperation.isDone)
+                {
+                    core.TrySetResult(asyncOperation.allAssets);
+                    return false;
+                }
+
+                return true;
+            }
+
+            bool TryReturn()
+            {
+                TaskTracker.RemoveTracking(this);
+                core.Reset();
+                asyncOperation = default;
+                progress = default;
+                cancellationToken = default;
+                return pool.TryPush(this);
+            }
+        }
+    }
+}
+
+#endif
+#endif

src/UniTask/Assets/Plugins/UniTask/Runtime/UnityAsyncExtensions.AssetBundleRequestAllAssets.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: e9147caba40da434da95b39709c13784
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

src/UniTask/Assets/Plugins/UniTask/Runtime/UnityAsyncExtensions.AsyncGPUReadback.cs

@@ -29,7 +29,8 @@ namespace Cysharp.Threading.Tasks
         sealed class AsyncGPUReadbackRequestAwaiterConfiguredSource : IUniTaskSource<AsyncGPUReadbackRequest>, IPlayerLoopItem, ITaskPoolNode<AsyncGPUReadbackRequestAwaiterConfiguredSource>
         {
             static TaskPool<AsyncGPUReadbackRequestAwaiterConfiguredSource> pool;
-            public AsyncGPUReadbackRequestAwaiterConfiguredSource NextNode { get; set; }
+            AsyncGPUReadbackRequestAwaiterConfiguredSource nextNode;
+            public ref AsyncGPUReadbackRequestAwaiterConfiguredSource NextNode => ref nextNode;
 
             static AsyncGPUReadbackRequestAwaiterConfiguredSource()
             {

src/UniTask/Assets/Plugins/UniTask/Runtime/UnityAsyncExtensions.Jobs.cs

@@ -4,6 +4,7 @@
 using System;
 using System.Threading;
 using Unity.Jobs;
+using UnityEngine;
 
 namespace Cysharp.Threading.Tasks
 {
@@ -85,7 +86,7 @@ namespace Cysharp.Threading.Tasks
 
             public bool MoveNext()
             {
-                if (jobHandle.IsCompleted)
+                if (jobHandle.IsCompleted | PlayerLoopHelper.IsEditorApplicationQuitting)
                 {
                     jobHandle.Complete();
                     core.TrySetResult(AsyncUnit.Default);

src/UniTask/Assets/Plugins/UniTask/Runtime/UnityAsyncExtensions.cs

@@ -5,7 +5,7 @@ using System.Runtime.CompilerServices;
 using System.Threading;
 using UnityEngine;
 using Cysharp.Threading.Tasks.Internal;
-#if ENABLE_UNITYWEBREQUEST
+#if ENABLE_UNITYWEBREQUEST && (!UNITY_2019_1_OR_NEWER || UNITASK_WEBREQUEST_SUPPORT)
 using UnityEngine.Networking;
 #endif
 
@@ -80,7 +80,8 @@ namespace Cysharp.Threading.Tasks
         sealed class AsyncOperationWithCancellationSource : IUniTaskSource, IPlayerLoopItem, ITaskPoolNode<AsyncOperationWithCancellationSource>
         {
             static TaskPool<AsyncOperationWithCancellationSource> pool;
-            public AsyncOperationWithCancellationSource NextNode { get; set; }
+            AsyncOperationWithCancellationSource nextNode;
+            public ref AsyncOperationWithCancellationSource NextNode => ref nextNode;
 
             static AsyncOperationWithCancellationSource()
             {
@@ -198,7 +199,8 @@ namespace Cysharp.Threading.Tasks
         sealed class AsyncOperationConfiguredSource : IUniTaskSource, IPlayerLoopItem, ITaskPoolNode<AsyncOperationConfiguredSource>
         {
             static TaskPool<AsyncOperationConfiguredSource> pool;
-            public AsyncOperationConfiguredSource NextNode { get; set; }
+            AsyncOperationConfiguredSource nextNode;
+            public ref AsyncOperationConfiguredSource NextNode => ref nextNode;
 
             static AsyncOperationConfiguredSource()
             {
@@ -374,7 +376,8 @@ namespace Cysharp.Threading.Tasks
         sealed class ResourceRequestWithCancellationSource : IUniTaskSource<UnityEngine.Object>, IPlayerLoopItem, ITaskPoolNode<ResourceRequestWithCancellationSource>
         {
             static TaskPool<ResourceRequestWithCancellationSource> pool;
-            public ResourceRequestWithCancellationSource NextNode { get; set; }
+            ResourceRequestWithCancellationSource nextNode;
+            public ref ResourceRequestWithCancellationSource NextNode => ref nextNode;
 
             static ResourceRequestWithCancellationSource()
             {
@@ -496,7 +499,8 @@ namespace Cysharp.Threading.Tasks
         sealed class ResourceRequestConfiguredSource : IUniTaskSource<UnityEngine.Object>, IPlayerLoopItem, ITaskPoolNode<ResourceRequestConfiguredSource>
         {
             static TaskPool<ResourceRequestConfiguredSource> pool;
-            public ResourceRequestConfiguredSource NextNode { get; set; }
+            ResourceRequestConfiguredSource nextNode;
+            public ref ResourceRequestConfiguredSource NextNode => ref nextNode;
 
             static ResourceRequestConfiguredSource()
             {
@@ -605,6 +609,7 @@ namespace Cysharp.Threading.Tasks
 
         #endregion
 
+#if UNITASK_ASSETBUNDLE_SUPPORT
         #region AssetBundleRequest
 
         public static AssetBundleRequestAwaiter GetAwaiter(this AssetBundleRequest asyncOperation)
@@ -676,7 +681,8 @@ namespace Cysharp.Threading.Tasks
         sealed class AssetBundleRequestWithCancellationSource : IUniTaskSource<UnityEngine.Object>, IPlayerLoopItem, ITaskPoolNode<AssetBundleRequestWithCancellationSource>
         {
             static TaskPool<AssetBundleRequestWithCancellationSource> pool;
-            public AssetBundleRequestWithCancellationSource NextNode { get; set; }
+            AssetBundleRequestWithCancellationSource nextNode;
+            public ref AssetBundleRequestWithCancellationSource NextNode => ref nextNode;
 
             static AssetBundleRequestWithCancellationSource()
             {
@@ -798,7 +804,8 @@ namespace Cysharp.Threading.Tasks
         sealed class AssetBundleRequestConfiguredSource : IUniTaskSource<UnityEngine.Object>, IPlayerLoopItem, ITaskPoolNode<AssetBundleRequestConfiguredSource>
         {
             static TaskPool<AssetBundleRequestConfiguredSource> pool;
-            public AssetBundleRequestConfiguredSource NextNode { get; set; }
+            AssetBundleRequestConfiguredSource nextNode;
+            public ref AssetBundleRequestConfiguredSource NextNode => ref nextNode;
 
             static AssetBundleRequestConfiguredSource()
             {
@@ -906,7 +913,9 @@ namespace Cysharp.Threading.Tasks
         }
 
         #endregion
+#endif
 
+#if UNITASK_ASSETBUNDLE_SUPPORT
         #region AssetBundleCreateRequest
 
         public static AssetBundleCreateRequestAwaiter GetAwaiter(this AssetBundleCreateRequest asyncOperation)
@@ -978,7 +987,8 @@ namespace Cysharp.Threading.Tasks
         sealed class AssetBundleCreateRequestWithCancellationSource : IUniTaskSource<AssetBundle>, IPlayerLoopItem, ITaskPoolNode<AssetBundleCreateRequestWithCancellationSource>
         {
             static TaskPool<AssetBundleCreateRequestWithCancellationSource> pool;
-            public AssetBundleCreateRequestWithCancellationSource NextNode { get; set; }
+            AssetBundleCreateRequestWithCancellationSource nextNode;
+            public ref AssetBundleCreateRequestWithCancellationSource NextNode => ref nextNode;
 
             static AssetBundleCreateRequestWithCancellationSource()
             {
@@ -1100,7 +1110,8 @@ namespace Cysharp.Threading.Tasks
         sealed class AssetBundleCreateRequestConfiguredSource : IUniTaskSource<AssetBundle>, IPlayerLoopItem, ITaskPoolNode<AssetBundleCreateRequestConfiguredSource>
         {
             static TaskPool<AssetBundleCreateRequestConfiguredSource> pool;
-            public AssetBundleCreateRequestConfiguredSource NextNode { get; set; }
+            AssetBundleCreateRequestConfiguredSource nextNode;
+            public ref AssetBundleCreateRequestConfiguredSource NextNode => ref nextNode;
 
             static AssetBundleCreateRequestConfiguredSource()
             {
@@ -1208,8 +1219,9 @@ namespace Cysharp.Threading.Tasks
         }
 
         #endregion
+#endif
 
-#if ENABLE_UNITYWEBREQUEST
+#if ENABLE_UNITYWEBREQUEST && (!UNITY_2019_1_OR_NEWER || UNITASK_WEBREQUEST_SUPPORT)
         #region UnityWebRequestAsyncOperation
 
         public static UnityWebRequestAsyncOperationAwaiter GetAwaiter(this UnityWebRequestAsyncOperation asyncOperation)
@@ -1303,7 +1315,8 @@ namespace Cysharp.Threading.Tasks
         sealed class UnityWebRequestAsyncOperationWithCancellationSource : IUniTaskSource<UnityWebRequest>, IPlayerLoopItem, ITaskPoolNode<UnityWebRequestAsyncOperationWithCancellationSource>
         {
             static TaskPool<UnityWebRequestAsyncOperationWithCancellationSource> pool;
-            public UnityWebRequestAsyncOperationWithCancellationSource NextNode { get; set; }
+            UnityWebRequestAsyncOperationWithCancellationSource nextNode;
+            public ref UnityWebRequestAsyncOperationWithCancellationSource NextNode => ref nextNode;
 
             static UnityWebRequestAsyncOperationWithCancellationSource()
             {
@@ -1434,7 +1447,8 @@ namespace Cysharp.Threading.Tasks
         sealed class UnityWebRequestAsyncOperationConfiguredSource : IUniTaskSource<UnityWebRequest>, IPlayerLoopItem, ITaskPoolNode<UnityWebRequestAsyncOperationConfiguredSource>
         {
             static TaskPool<UnityWebRequestAsyncOperationConfiguredSource> pool;
-            public UnityWebRequestAsyncOperationConfiguredSource NextNode { get; set; }
+            UnityWebRequestAsyncOperationConfiguredSource nextNode;
+            public ref UnityWebRequestAsyncOperationConfiguredSource NextNode => ref nextNode;
 
             static UnityWebRequestAsyncOperationConfiguredSource()
             {

src/UniTask/Assets/Plugins/UniTask/Runtime/UnityAsyncExtensions.tt

@@ -17,6 +17,7 @@
     Func<string, string> ToUniTaskReturnType = x => (x == "void") ? "UniTask" : $"UniTask<{x}>";
     Func<string, string> ToIUniTaskSourceReturnType = x => (x == "void") ? "IUniTaskSource" : $"IUniTaskSource<{x}>";
     Func<(string typeName, string returnType, string returnField), bool> IsUnityWebRequest = x => x.returnType == "UnityWebRequest";
+    Func<(string typeName, string returnType, string returnField), bool> IsAssetBundleModule = x => x.typeName == "AssetBundleRequest" || x.typeName == "AssetBundleCreateRequest";
     Func<(string typeName, string returnType, string returnField), bool> IsVoid = x => x.returnType == "void";
 #>
 #pragma warning disable CS1591 // Missing XML comment for publicly visible type or member
@@ -37,6 +38,8 @@ namespace Cysharp.Threading.Tasks
 <# foreach(var t in types) { #>
 <# if(IsUnityWebRequest(t)) { #>
 #if ENABLE_UNITYWEBREQUEST
+<# } else if(IsAssetBundleModule(t)) { #>
+#if UNITASK_ASSETBUNDLE_SUPPORT
 <# } #>
         #region <#= t.typeName #>
 
@@ -151,7 +154,8 @@ namespace Cysharp.Threading.Tasks
         sealed class <#= t.typeName #>WithCancellationSource : <#= ToIUniTaskSourceReturnType(t.returnType) #>, IPlayerLoopItem, ITaskPoolNode<<#= t.typeName #>WithCancellationSource>
         {
             static TaskPool<<#= t.typeName #>WithCancellationSource> pool;
-            public <#= t.typeName #>WithCancellationSource NextNode { get; set; }
+            <#= t.typeName #>WithCancellationSource nextNode;
+            public ref <#= t.typeName #>WithCancellationSource NextNode => ref nextNode;
 
             static <#= t.typeName #>WithCancellationSource()
             {
@@ -294,7 +298,8 @@ namespace Cysharp.Threading.Tasks
         sealed class <#= t.typeName #>ConfiguredSource : <#= ToIUniTaskSourceReturnType(t.returnType) #>, IPlayerLoopItem, ITaskPoolNode<<#= t.typeName #>ConfiguredSource>
         {
             static TaskPool<<#= t.typeName #>ConfiguredSource> pool;
-            public <#= t.typeName #>ConfiguredSource NextNode { get; set; }
+            <#= t.typeName #>ConfiguredSource nextNode;
+            public ref <#= t.typeName #>ConfiguredSource NextNode => ref nextNode;
 
             static <#= t.typeName #>ConfiguredSource()
             {
@@ -422,7 +427,7 @@ namespace Cysharp.Threading.Tasks
         }
 
         #endregion
-<# if(IsUnityWebRequest(t)) { #>
+<# if(IsUnityWebRequest(t) || IsAssetBundleModule(t)) { #>
 #endif
 <# } #>
 

src/UniTask/Assets/Plugins/UniTask/Runtime/UnityAsyncExtensions.uGUI.cs

@@ -1,5 +1,5 @@
 #pragma warning disable CS1591 // Missing XML comment for publicly visible type or member
-
+#if !UNITY_2019_1_OR_NEWER || UNITASK_UGUI_SUPPORT
 using System;
 using System.Threading;
 using UnityEngine;
@@ -364,6 +364,7 @@ namespace Cysharp.Threading.Tasks
 
         public AsyncUnityEventHandler(UnityEvent unityEvent, CancellationToken cancellationToken, bool callOnce)
         {
+            this.cancellationToken = cancellationToken;
             if (cancellationToken.IsCancellationRequested)
             {
                 isDisposed = true;
@@ -372,7 +373,6 @@ namespace Cysharp.Threading.Tasks
 
             this.action = Invoke;
             this.unityEvent = unityEvent;
-            this.cancellationToken = cancellationToken;
             this.callOnce = callOnce;
 
             unityEvent.AddListener(action);
@@ -388,6 +388,10 @@ namespace Cysharp.Threading.Tasks
         public UniTask OnInvokeAsync()
         {
             core.Reset();
+            if (isDisposed)
+            {
+                core.TrySetCanceled(this.cancellationToken);
+            }
             return new UniTask(this, core.Version);
         }
 
@@ -470,6 +474,7 @@ namespace Cysharp.Threading.Tasks
 
         public AsyncUnityEventHandler(UnityEvent<T> unityEvent, CancellationToken cancellationToken, bool callOnce)
         {
+            this.cancellationToken = cancellationToken;
             if (cancellationToken.IsCancellationRequested)
             {
                 isDisposed = true;
@@ -478,7 +483,6 @@ namespace Cysharp.Threading.Tasks
 
             this.action = Invoke;
             this.unityEvent = unityEvent;
-            this.cancellationToken = cancellationToken;
             this.callOnce = callOnce;
 
             unityEvent.AddListener(action);
@@ -494,6 +498,10 @@ namespace Cysharp.Threading.Tasks
         public UniTask<T> OnInvokeAsync()
         {
             core.Reset();
+            if (isDisposed)
+            {
+                core.TrySetCanceled(this.cancellationToken);
+            }
             return new UniTask<T>(this, core.Version);
         }
 
@@ -813,4 +821,6 @@ namespace Cysharp.Threading.Tasks
             }
         }
     }
-}
+}
+
+#endif

src/UniTask/Assets/Plugins/UniTask/Runtime/UnityBindingExtensions.cs

@@ -1,12 +1,15 @@
 using System;
 using System.Threading;
 using UnityEngine;
+#if !UNITY_2019_1_OR_NEWER || UNITASK_UGUI_SUPPORT
 using UnityEngine.UI;
+#endif
 
 namespace Cysharp.Threading.Tasks
 {
     public static class UnityBindingExtensions
     {
+#if !UNITY_2019_1_OR_NEWER || UNITASK_UGUI_SUPPORT
         // <string> -> Text
 
         public static void BindTo(this IUniTaskAsyncEnumerable<string> source, Text text, bool rebindOnError = true)
@@ -180,6 +183,7 @@ namespace Cysharp.Threading.Tasks
                 }
             }
         }
+#endif
 
         // <T> -> Action
 

src/UniTask/Assets/Plugins/UniTask/Runtime/UnityWebRequestException.cs

@@ -1,6 +1,7 @@
-#if ENABLE_UNITYWEBREQUEST
+#if ENABLE_UNITYWEBREQUEST && (!UNITY_2019_1_OR_NEWER || UNITASK_WEBREQUEST_SUPPORT)
 
 using System;
+using System.Collections.Generic;
 using UnityEngine.Networking;
 
 namespace Cysharp.Threading.Tasks
@@ -17,6 +18,7 @@ namespace Cysharp.Threading.Tasks
         public string Error { get; }
         public string Text { get; }
         public long ResponseCode { get; }
+        public Dictionary<string, string> ResponseHeaders { get; }
 
         string msg;
 
@@ -38,6 +40,7 @@ namespace Cysharp.Threading.Tasks
                     this.Text = dhb.text;
                 }
             }
+            this.ResponseHeaders = unityWebRequest.GetResponseHeaders();
         }
 
         public override string Message

src/UniTask/Assets/Plugins/UniTask/package.json

@@ -1,7 +1,7 @@
 {
     "name": "com.cysharp.unitask",
     "displayName": "UniTask",
-    "version": "2.0.26",
+    "version": "2.1.2",
     "unity": "2018.4",
     "description": "Provides an efficient async/await integration to Unity.",
     "keywords": [ "async/await", "async", "Task", "UniTask" ],

src/UniTask/Assets/Scenes/EditorTest1.cs

@@ -0,0 +1,41 @@
+#if UNITY_EDITOR
+
+using System;
+using Cysharp.Threading.Tasks;
+using UnityEditor;
+using UnityEngine;
+
+public class Test1
+{
+    [MenuItem("Test/Test1")]
+    public static async UniTaskVoid TestFunc()
+    {
+        await DoSomeThing();
+        string[] scenes = new string[]
+        {
+            "Assets/Scenes/SandboxMain.unity",
+        };
+
+        try
+        {
+            Debug.Log("Build Begin");
+            BuildPipeline.BuildPlayer(scenes, Application.dataPath + "../target", BuildTarget.StandaloneWindows, BuildOptions.CompressWithLz4);
+            Debug.Log("Build After");
+        }
+        catch (Exception e)
+        {
+            Debug.LogError(e.Message);
+        }
+    }
+
+    public static async UniTask DoSomeThing()
+    {
+        Debug.Log("Dosomething");
+        await UniTask.Delay(1500, DelayType.Realtime);
+        Debug.Log("Dosomething 2");
+        await UniTask.Delay(1000, DelayType.Realtime);
+        Debug.Log("Dosomething 3");
+    }
+}
+
+#endif

src/UniTask/Assets/Scenes/EditorTest1.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 48003021292963e48b2493e915dca5ac
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

src/UniTask/Assets/Scenes/ExceptionExamples.cs

@@ -2,6 +2,7 @@
 using System;
 using System.Collections.Generic;
 using UnityEngine;
+// using UnityEngine.AddressableAssets;
 
 /*UNniTastWhenAnyTester*/
 
@@ -49,4 +50,9 @@ public class ExceptionExamples : MonoBehaviour
         await UniTask.Delay(100);
         return taskIndex;
     }
+
+    //void AddressablesTest()
+    //{
+    //    Addressables.ClearDependencyCacheAsync("key", true);
+    //}
 }

src/UniTask/Assets/Scenes/MiddlewareSample.cs

@@ -0,0 +1,471 @@
+//using Cysharp.Threading.Tasks;
+//using System;
+//using System.Collections.Generic;
+//using System.Diagnostics;
+//using System.Linq;
+//using System.Text;
+//using System.Threading;
+//using System.Threading.Tasks;
+//using UnityEngine;
+//using UnityEngine.Networking;
+//using UnityEngine.SceneManagement;
+//using UnityEngine.UI;
+
+//namespace Cysharp.Threading.Tasks.Sample
+//{
+//    //public class Sample2
+//    //{
+//    //    public Sample2()
+//    //    {
+//    //        // デコレーターの詰まったClientを生成（これは一度作ったらフィールドに保存可）
+//    //        var client = new NetworkClient("http://localhost", TimeSpan.FromSeconds(10),
+//    //            new QueueRequestDecorator(),
+//    //            new LoggingDecorator(),
+//    //            new AppendTokenDecorator(),
+//    //            new SetupHeaderDecorator());
+
+
+//    //        await client.PostAsync("/User/Register", new { Id = 100 });
+
+
+//    //    }
+//    //}
+
+
+//    public class ReturnToTitleDecorator : IAsyncDecorator
+//    {
+//        public async UniTask<ResponseContext> SendAsync(RequestContext context, CancellationToken cancellationToken, Func<RequestContext, CancellationToken, UniTask<ResponseContext>> next)
+//        {
+//            try
+//            {
+//                return await next(context, cancellationToken);
+//            }
+//            catch (Exception ex)
+//            {
+//                if (ex is OperationCanceledException)
+//                {
+//                    // キャンセルはきっと想定されている処理なのでそのまんまスルー（呼び出し側でOperationCanceledExceptionとして飛んでいく)
+//                    throw;
+//                }
+
+//                if (ex is UnityWebRequestException uwe)
+//                {
+//                    // ステータスコードを使って、タイトルに戻す例外です、とかリトライさせる例外です、とかハンドリングさせると便利
+//                    // if (uwe.ResponseCode) { }...
+//                }
+
+//                // サーバー例外のMessageを直接出すなんて乱暴なことはデバッグ時だけですよ勿論。
+//                var result = await MessageDialog.ShowAsync(ex.Message);
+
+//                // OK か Cancelかで分岐するなら。今回はボタン一個、OKのみの想定なので無視
+//                // if (result == DialogResult.Ok) { }...
+
+//                // シーン呼び出しはawaitしないこと！awaitして正常終了しちゃうと、この通信の呼び出し元に処理が戻って続行してしまいます
+//                // のでForget。
+//                SceneManager.LoadSceneAsync("TitleScene").ToUniTask().Forget();
+
+
+//                // そしてOperationCanceledExceptionを投げて、この通信の呼び出し元の処理はキャンセル扱いにして終了させる
+//                throw new OperationCanceledException();
+//            }
+//        }
+//    }
+
+//    public enum DialogResult
+//    {
+//        Ok,
+//        Cancel
+//    }
+
+//    public static class MessageDialog
+//    {
+//        public static async UniTask<DialogResult> ShowAsync(string message)
+//        {
+//            // (例えば)Prefabで作っておいたダイアログを生成する
+//            var view = await Resources.LoadAsync("Prefabs/Dialog");
+
+//            // Ok, Cancelボタンのどちらかが押されるのを待機
+//            return await (view as GameObject).GetComponent<MessageDialogView>().ClickResult;
+//        }
+//    }
+
+//    public class MessageDialogView : MonoBehaviour
+//    {
+//        [SerializeField] Button okButton = default;
+//        [SerializeField] Button closeButton = default;
+
+//        UniTaskCompletionSource<DialogResult> taskCompletion;
+
+//        // これでどちらかが押されるまで無限に待つを表現
+//        public UniTask<DialogResult> ClickResult => taskCompletion.Task;
+
+//        private void Start()
+//        {
+//            taskCompletion = new UniTaskCompletionSource<DialogResult>();
+
+//            okButton.onClick.AddListener(() =>
+//            {
+//                taskCompletion.TrySetResult(DialogResult.Ok);
+//            });
+
+//            closeButton.onClick.AddListener(() =>
+//            {
+//                taskCompletion.TrySetResult(DialogResult.Cancel);
+//            });
+//        }
+
+//        // もしボタンが押されずに消滅した場合にネンノタメ。
+//        private void OnDestroy()
+//        {
+//            taskCompletion.TrySetResult(DialogResult.Cancel);
+//        }
+//    }
+
+//    public class MockDecorator : IAsyncDecorator
+//    {
+//        Dictionary<string, object> mock;
+
+//        // Pathと型を1:1にして事前定義したオブジェクトを返す辞書を渡す
+//        public MockDecorator(Dictionary<string, object> mock)
+//        {
+//            this.mock = mock;
+//        }
+
+//        public UniTask<ResponseContext> SendAsync(RequestContext context, CancellationToken cancellationToken, Func<RequestContext, CancellationToken, UniTask<ResponseContext>> next)
+//        {
+//            if (mock.TryGetValue(context.Path, out var value))
+//            {
+//                // 一致したものがあればそれを返す（実際の通信は行わない）
+//                return new UniTask<ResponseContext>(new ResponseContext(value));
+//            }
+//            else
+//            {
+//                return next(context, cancellationToken);
+//            }
+//        }
+//    }
+
+//    //public class LoggingDecorator : IAsyncDecorator
+//    //{
+//    //    public async UniTask<ResponseContext> SendAsync(RequestContext context, CancellationToken cancellationToken, Func<RequestContext, CancellationToken, UniTask<ResponseContext>> next)
+//    //    {
+//    //        var sw = Stopwatch.StartNew();
+//    //        try
+//    //        {
+//    //            UnityEngine.Debug.Log("Start Network Request:" + context.Path);
+
+//    //            var response = await next(context, cancellationToken);
+
+//    //            UnityEngine.Debug.Log($"Complete Network Request: {context.Path} , Elapsed: {sw.Elapsed}, Size: {response.GetRawData().Length}");
+
+//    //            return response;
+//    //        }
+//    //        catch (Exception ex)
+//    //        {
+//    //            if (ex is OperationCanceledException)
+//    //            {
+//    //                UnityEngine.Debug.Log("Request Canceled:" + context.Path);
+//    //            }
+//    //            else if (ex is TimeoutException)
+//    //            {
+//    //                UnityEngine.Debug.Log("Request Timeout:" + context.Path);
+//    //            }
+//    //            else if (ex is UnityWebRequestException webex)
+//    //            {
+//    //                if (webex.IsHttpError)
+//    //                {
+//    //                    UnityEngine.Debug.Log($"Request HttpError: {context.Path} Code:{webex.ResponseCode} Message:{webex.Message}");
+//    //                }
+//    //                else if (webex.IsNetworkError)
+//    //                {
+//    //                    UnityEngine.Debug.Log($"Request NetworkError: {context.Path} Code:{webex.ResponseCode} Message:{webex.Message}");
+//    //                }
+//    //            }
+//    //            throw;
+//    //        }
+//    //        finally
+//    //        {
+//    //            /* log other */
+//    //        }
+//    //    }
+//    //}
+
+//    public class SetupHeaderDecorator : IAsyncDecorator
+//    {
+//        public async UniTask<ResponseContext> SendAsync(RequestContext context, CancellationToken cancellationToken, Func<RequestContext, CancellationToken, UniTask<ResponseContext>> next)
+//        {
+//            context.RequestHeaders["x-app-timestamp"] = context.Timestamp.ToString();
+//            context.RequestHeaders["x-user-id"] = "132141411"; // どこかから持ってくる
+//            context.RequestHeaders["x-access-token"] = "fafafawfafewaea"; // どこかから持ってくる2
+
+//            var respsonse = await next(context, cancellationToken);
+
+//            var nextToken = respsonse.ResponseHeaders["token"];
+//            // UserProfile.Token = nextToken; // どこかにセットするということにする
+
+//            return respsonse;
+//        }
+//    }
+
+
+//    public class AppendTokenDecorator : IAsyncDecorator
+//    {
+//        public async UniTask<ResponseContext> SendAsync(RequestContext context, CancellationToken cancellationToken, Func<RequestContext, CancellationToken, UniTask<ResponseContext>> next)
+//        {
+//            string token = "token"; // どっかから取ってくるということにする
+//            RETRY:
+//            try
+//            {
+//                context.RequestHeaders["x-accesss-token"] = token;
+//                return await next(context, cancellationToken);
+//            }
+//            catch (UnityWebRequestException ex)
+//            {
+//                // 例えば700はTokenを再取得してください的な意味だったとする
+//                if (ex.ResponseCode == 700)
+//                {
+//                    // 別口でTokenを取得します的な処理
+//                    var newToken = await new NetworkClient(context.BasePath, context.Timeout).PostAsync<string>("/Auth/GetToken", "access_token", cancellationToken);
+//                    context.Reset(this);
+//                    goto RETRY;
+//                }
+
+//                goto RETRY;
+//            }
+//        }
+//    }
+
+//    public class QueueRequestDecorator : IAsyncDecorator
+//    {
+//        readonly Queue<(UniTaskCompletionSource<ResponseContext>, RequestContext, CancellationToken, Func<RequestContext, CancellationToken, UniTask<ResponseContext>>)> q = new Queue<(UniTaskCompletionSource<ResponseContext>, RequestContext, CancellationToken, Func<RequestContext, CancellationToken, UniTask<ResponseContext>>)>();
+//        bool running;
+
+//        public async UniTask<ResponseContext> SendAsync(RequestContext context, CancellationToken cancellationToken, Func<RequestContext, CancellationToken, UniTask<ResponseContext>> next)
+//        {
+//            if (q.Count == 0)
+//            {
+//                return await next(context, cancellationToken);
+//            }
+//            else
+//            {
+//                var completionSource = new UniTaskCompletionSource<ResponseContext>();
+//                q.Enqueue((completionSource, context, cancellationToken, next));
+//                if (!running)
+//                {
+//                    Run().Forget();
+//                }
+//                return await completionSource.Task;
+//            }
+//        }
+
+//        async UniTaskVoid Run()
+//        {
+//            running = true;
+//            try
+//            {
+//                while (q.Count != 0)
+//                {
+//                    var (tcs, context, cancellationToken, next) = q.Dequeue();
+//                    try
+//                    {
+//                        var response = await next(context, cancellationToken);
+//                        tcs.TrySetResult(response);
+//                    }
+//                    catch (Exception ex)
+//                    {
+//                        tcs.TrySetException(ex);
+//                    }
+//                }
+//            }
+//            finally
+//            {
+//                running = false;
+//            }
+//        }
+//    }
+
+
+//    public class RequestContext
+//    {
+//        int decoratorIndex;
+//        readonly IAsyncDecorator[] decorators;
+//        Dictionary<string, string> headers;
+
+//        public string BasePath { get; }
+//        public string Path { get; }
+//        public object Value { get; }
+//        public TimeSpan Timeout { get; }
+//        public DateTimeOffset Timestamp { get; private set; }
+
+//        public IDictionary<string, string> RequestHeaders
+//        {
+//            get
+//            {
+//                if (headers == null)
+//                {
+//                    headers = new Dictionary<string, string>();
+//                }
+//                return headers;
+//            }
+//        }
+
+//        public RequestContext(string basePath, string path, object value, TimeSpan timeout, IAsyncDecorator[] filters)
+//        {
+//            this.decoratorIndex = -1;
+//            this.decorators = filters;
+//            this.BasePath = basePath;
+//            this.Path = path;
+//            this.Value = value;
+//            this.Timeout = timeout;
+//            this.Timestamp = DateTimeOffset.UtcNow;
+//        }
+
+//        internal Dictionary<string, string> GetRawHeaders() => headers;
+//        internal IAsyncDecorator GetNextDecorator() => decorators[++decoratorIndex];
+
+//        public void Reset(IAsyncDecorator currentFilter)
+//        {
+//            decoratorIndex = Array.IndexOf(decorators, currentFilter);
+//            if (headers != null)
+//            {
+//                headers.Clear();
+//            }
+//            Timestamp = DateTimeOffset.UtcNow;
+//        }
+//    }
+
+//    public class ResponseContext
+//    {
+//        bool hasValue;
+//        object value;
+//        readonly byte[] bytes;
+
+//        public long StatusCode { get; }
+//        public Dictionary<string, string> ResponseHeaders { get; }
+
+//        public ResponseContext(object value, Dictionary<string, string> header = null)
+//        {
+//            this.hasValue = true;
+//            this.value = value;
+//            this.StatusCode = 200;
+//            this.ResponseHeaders = (header ?? new Dictionary<string, string>());
+//        }
+
+//        public ResponseContext(byte[] bytes, long statusCode, Dictionary<string, string> responseHeaders)
+//        {
+//            this.hasValue = false;
+//            this.bytes = bytes;
+//            this.StatusCode = statusCode;
+//            this.ResponseHeaders = responseHeaders;
+//        }
+
+//        public byte[] GetRawData() => bytes;
+
+//        public T GetResponseAs<T>()
+//        {
+//            if (hasValue)
+//            {
+//                return (T)value;
+//            }
+
+//            value = JsonUtility.FromJson<T>(Encoding.UTF8.GetString(bytes));
+//            hasValue = true;
+//            return (T)value;
+//        }
+//    }
+
+//    public interface IAsyncDecorator
+//    {
+//        UniTask<ResponseContext> SendAsync(RequestContext context, CancellationToken cancellationToken, Func<RequestContext, CancellationToken, UniTask<ResponseContext>> next);
+//    }
+
+
+//    public class NetworkClient : IAsyncDecorator
+//    {
+//        readonly Func<RequestContext, CancellationToken, UniTask<ResponseContext>> next;
+//        readonly IAsyncDecorator[] decorators;
+//        readonly TimeSpan timeout;
+//        readonly IProgress<float> progress;
+//        readonly string basePath;
+
+//        public NetworkClient(string basePath, TimeSpan timeout, params IAsyncDecorator[] decorators)
+//            : this(basePath, timeout, null, decorators)
+//        {
+//        }
+
+//        public NetworkClient(string basePath, TimeSpan timeout, IProgress<float> progress, params IAsyncDecorator[] decorators)
+//        {
+//            this.next = InvokeRecursive; // setup delegate
+
+//            this.basePath = basePath;
+//            this.timeout = timeout;
+//            this.progress = progress;
+//            this.decorators = new IAsyncDecorator[decorators.Length + 1];
+//            Array.Copy(decorators, this.decorators, decorators.Length);
+//            this.decorators[this.decorators.Length - 1] = this;
+//        }
+
+//        public async UniTask<T> PostAsync<T>(string path, T value, CancellationToken cancellationToken = default)
+//        {
+//            var request = new RequestContext(basePath, path, value, timeout, decorators);
+//            var response = await InvokeRecursive(request, cancellationToken);
+//            return response.GetResponseAs<T>();
+//        }
+
+
+//        UniTask<ResponseContext> InvokeRecursive(RequestContext context, CancellationToken cancellationToken)
+//        {
+//            return context.GetNextDecorator().SendAsync(context, cancellationToken, next); // マジカル再帰処理
+//        }
+
+//        async UniTask<ResponseContext> IAsyncDecorator.SendAsync(RequestContext context, CancellationToken cancellationToken, Func<RequestContext, CancellationToken, UniTask<ResponseContext>> _)
+//        {
+//            // Postしか興味ないからPostにしかしないよ！
+//            // パフォーマンスを最大限にしたい場合はuploadHandler, downloadHandlerをカスタマイズすること
+
+//            // JSONでbodyに送るというパラメータで送るという雑設定。
+//            var data = JsonUtility.ToJson(context.Value);
+//            var formData = new Dictionary<string, string> { { "body", data } };
+
+//            using (var req = UnityWebRequest.Post(basePath + context.Path, formData))
+//            {
+//                var header = context.GetRawHeaders();
+//                if (header != null)
+//                {
+//                    foreach (var item in header)
+//                    {
+//                        req.SetRequestHeader(item.Key, item.Value);
+//                    }
+//                }
+
+//                // Timeout処理はCancellationTokenSourceのCancelAfterSlim(UniTask拡張)を使ってサクッと処理
+//                var linkToken = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken);
+//                linkToken.CancelAfterSlim(timeout);
+//                try
+//                {
+//                    // 完了待ちや終了処理はUniTaskの拡張自体に丸投げ
+//                    await req.SendWebRequest().ToUniTask(progress: progress, cancellationToken: linkToken.Token);
+//                }
+//                catch (OperationCanceledException)
+//                {
+//                    // 元キャンセレーションソースがキャンセルしてなければTimeoutによるものと判定
+//                    if (!cancellationToken.IsCancellationRequested)
+//                    {
+//                        throw new TimeoutException();
+//                    }
+//                }
+//                finally
+//                {
+//                    // Timeoutに引っかからなかった場合にてるのでCancelAfterSlimの裏で回ってるループをこれで終わらせとく
+//                    if (!linkToken.IsCancellationRequested)
+//                    {
+//                        linkToken.Cancel();
+//                    }
+//                }
+
+//                // UnityWebRequestを先にDisposeしちゃうので先に必要なものを取得しておく（性能的には無駄なのでパフォーマンスを最大限にしたい場合は更に一工夫を）
+//                return new ResponseContext(req.downloadHandler.data, req.responseCode, req.GetResponseHeaders());
+//            }
+//        }
+//    }
+//}

src/UniTask/Assets/Scenes/MiddlewareSample.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 7fc39a4b35a8db44592cddc0b365942f
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

src/UniTask/Assets/Scenes/SandboxMain.cs

@@ -17,6 +17,7 @@ using UnityEngine.UI;
 using UnityEngine.SceneManagement;
 using UnityEngine.Rendering;
 using System.IO;
+using System.Linq.Expressions;
 
 
 // using DG.Tweening;
@@ -133,6 +134,7 @@ public class SandboxMain : MonoBehaviour
     UniTaskCompletionSource ucs;
     async UniTask<int> FooAsync()
     {
+
         // use F10, will crash.
         var loop = int.Parse("9");
         await UniTask.DelayFrame(loop);
@@ -190,6 +192,9 @@ public class SandboxMain : MonoBehaviour
 
     async UniTask RunStandardDelayAsync()
     {
+
+
+
         UnityEngine.Debug.Log("DEB");
 
         await UniTask.DelayFrame(30);
@@ -220,6 +225,11 @@ public class SandboxMain : MonoBehaviour
     async UniTaskVoid Update2()
     {
 
+
+
+
+
+
         UnityEngine.Debug.Log("async linq!");
 
         await UniTaskAsyncEnumerable.Range(1, 10)
@@ -258,32 +268,33 @@ public class SandboxMain : MonoBehaviour
 
     async Task Test1()
     {
-        var r = await TcsAsync("https://bing.com/");
+        // var r = await TcsAsync("https://bing.com/");
+        await Task.Yield();
         Debug.Log("TASKASYNC");
     }
 
-    async UniTaskVoid Test2()
-    {
-        try
-        {
-            //var cts = new CancellationTokenSource();
-            //var r = UniAsync("https://bing.com/", cts.Token);
-            //cts.Cancel();
-            //await r;
-            Debug.Log("SendWebRequestDone:" + PlayerLoopInfo.CurrentLoopType);
+    //async UniTaskVoid Test2()
+    //{
+    //    try
+    //    {
+    //        //var cts = new CancellationTokenSource();
+    //        //var r = UniAsync("https://bing.com/", cts.Token);
+    //        //cts.Cancel();
+    //        //await r;
+    //        Debug.Log("SendWebRequestDone:" + PlayerLoopInfo.CurrentLoopType);
 
 
-            //        var foo = await UnityWebRequest.Get("https://bing.com/").SendWebRequest();
-            //          foo.downloadHandler.text;
-            //
-            _ = await UnityWebRequest.Get("https://bing.com/").SendWebRequest().WithCancellation(CancellationToken.None);
-            Debug.Log("SendWebRequestWithCancellationDone:" + PlayerLoopInfo.CurrentLoopType);
-        }
-        catch
-        {
-            Debug.Log("Canceled");
-        }
-    }
+    //        //        var foo = await UnityWebRequest.Get("https://bing.com/").SendWebRequest();
+    //        //          foo.downloadHandler.text;
+    //        //
+    //        _ = await UnityWebRequest.Get("https://bing.com/").SendWebRequest().WithCancellation(CancellationToken.None);
+    //        Debug.Log("SendWebRequestWithCancellationDone:" + PlayerLoopInfo.CurrentLoopType);
+    //    }
+    //    catch
+    //    {
+    //        Debug.Log("Canceled");
+    //    }
+    //}
 
     IEnumerator Test3(string url)
     {
@@ -292,17 +303,17 @@ public class SandboxMain : MonoBehaviour
         Debug.Log("COROUTINE");
     }
 
-    static async Task<UnityWebRequest> TcsAsync(string url)
-    {
-        var req = await UnityWebRequest.Get(url).SendWebRequest();
-        return req;
-    }
+    //static async Task<UnityWebRequest> TcsAsync(string url)
+    //{
+    //    var req = await UnityWebRequest.Get(url).SendWebRequest();
+    //    return req;
+    //}
 
-    static async UniTask<UnityWebRequest> UniAsync(string url, CancellationToken cancellationToken)
-    {
-        var req = await UnityWebRequest.Get(url).SendWebRequest().WithCancellation(cancellationToken);
-        return req;
-    }
+    //static async UniTask<UnityWebRequest> UniAsync(string url, CancellationToken cancellationToken)
+    //{
+    //    var req = await UnityWebRequest.Get(url).SendWebRequest().WithCancellation(cancellationToken);
+    //    return req;
+    //}
 
     async Task<int> Test()
     {
@@ -417,15 +428,15 @@ public class SandboxMain : MonoBehaviour
         Debug.Log("after");
     }
 
-    private async UniTaskVoid ExecuteAsync()
-    {
-        var req = UnityWebRequest.Get("https://google.com/");
+    //private async UniTaskVoid ExecuteAsync()
+    //{
+    //    var req = UnityWebRequest.Get("https://google.com/");
 
-        var v = await req.SendWebRequest().ToUniTask();
-        // req.Dispose();
-        Debug.Log($"{v.isDone} {v.isHttpError} {v.isNetworkError}");
-        Debug.Log(v.downloadHandler.text);
-    }
+    //    var v = await req.SendWebRequest().ToUniTask();
+    //    // req.Dispose();
+    //    Debug.Log($"{v.isDone} {v.isHttpError} {v.isNetworkError}");
+    //    Debug.Log(v.downloadHandler.text);
+    //}
     private async void Go()
     {
         await UniTask.DelayFrame(0);
@@ -455,7 +466,7 @@ public class SandboxMain : MonoBehaviour
 
     private void Awake()
     {
-        PlayerLoopInfo.Inject();
+        // PlayerLoopInfo.Inject();
         PrepareCamera();
     }
 
@@ -473,226 +484,82 @@ public class SandboxMain : MonoBehaviour
         });
     }
 
+    async void RunStandardTaskAsync()
+    {
+        Debug.Log("Wait 3 seconds");
+        await Task.Delay(TimeSpan.FromSeconds(3));
+
+        Debug.Log("Current SyncContext:" + SynchronizationContext.Current.GetType().FullName);
+    }
+
+
+    async UniTask QuitCheck()
+    {
+        try
+        {
+            await UniTask.Delay(TimeSpan.FromMinutes(1), cancellationToken: quitSource.Token);
+        }
+        finally
+        {
+            Debug.Log("End QuitCheck async");
+        }
+    }
+
+    CancellationTokenSource quitSource = new CancellationTokenSource();
+
+
+    IEnumerator TestCor()
+    {
+        Debug.Log("start cor");
+        yield return null;
+        yield return new WaitForEndOfFrame();
+        Debug.Log("end cor");
+    }
+
+    IEnumerator LastYieldCore()
+    {
+        Debug.Log("YieldBegin:" + Time.frameCount);
+        yield return new WaitForEndOfFrame();
+        Debug.Log("YieldEnd:" + Time.frameCount);
+    }
+
+    private static async UniTask TestAsync(CancellationToken ct)
+    {
+        Debug.Log("TestAsync Start.");
+        var count = 0;
+        while (!ct.IsCancellationRequested)
+        {
+            try
+            {
+                Debug.Log($"TestAsync try count:{++count}");
+                var task1 = new WaitUntil(() => UnityEngine.Random.Range(0, 10) == 0).ToUniTask();
+                var task2 = new WaitUntil(() => UnityEngine.Random.Range(0, 10) == 0).ToUniTask();
+                var task3 = new WaitUntil(() => UnityEngine.Random.Range(0, 10) == 0).ToUniTask();
+
+                await UniTask.WhenAny(task1, task2, task3);
+            }
+            catch (Exception e)
+            {
+                Debug.LogError(e);
+                return;
+            }
+        }
+        Debug.Log("TestAsync Finished.");
+    }
 
     async UniTaskVoid Start()
     {
-        var url =  "http://google.com/404";
-        var webRequestAsyncOperation = UnityWebRequest.Get(url).SendWebRequest();
-        await webRequestAsyncOperation.ToUniTask();
+        var cts = new CancellationTokenSource();
 
-        //PlayerLoopInfo.Inject();
-
-        //_ = AsyncFixedUpdate();
-        //StartCoroutine(CoroutineFixedUpdate());
-
-        //StartCoroutine(TestCoroutine().ToCoroutine());
-
-        // Application.logMessageReceived += Application_logMessageReceived;
-
-        // var rp = new AsyncReactiveProperty<int>();
-
-
-        // rp.AddTo(this.GetCancellationTokenOnDestroy());
-        //var cts = new CancellationTokenSource();
-
-
-        // UniTask.Post(
-
-        // CancellationToken.
-
-        //UniTask.Delay(TimeSpan.FromSeconds(3)).
-
-
-        //okButton.onClick.AddListener(UniTask.UnityAction(async () =>
-        //{
-        //    _ = ExecuteAsync();
-
-        //    await UniTask.Yield();
-
-        //    //await DelayCheck();
-        //    /*
-        //    UnityEngine.Debug.Log("click:" + PlayerLoopInfo.CurrentLoopType);
-        //    StartCoroutine(CoroutineRun());
-        //    StartCoroutine(CoroutineRun2());
-        //    _ = AsyncRun();
-        //    _ = AsyncLastUpdate();
-        //    _ = AsyncLastLast();
-        //    */
-        //    //await UniTask.Yield();
-        //    //_ = Test2();
-        //    // EarlyUpdate.ExecuteMainThreadJobs
-        //    // _ = Test2();
-
-        //    //var t = await Resources.LoadAsync<TextAsset>(Application.streamingAssetsPath + "test.txt");
-        //    //Debug.Log("LoadEnd" + PlayerLoopInfo.CurrentLoopType + ", " + (t != null));
-        //    //Debug.Log("LoadEnd" + PlayerLoopInfo.CurrentLoopType + ", " + ((TextAsset)t).text);
-
-
-        //    //await UniTask.Yield(PlayerLoopTiming.LastUpdate);
-        //    //UnityEngine.Debug.Log("after update:" + Time.frameCount);
-        //    ////await UniTask.NextFrame();
-        //    ////await UniTask.Yield();
-        //    ////UnityEngine.Debug.Log("after update nextframe:" + Time.frameCount);
-
-        //    //StartCoroutine(CoroutineRun2());
-        //    ////StartCoroutine(CoroutineRun());
-        //    //UnityEngine.Debug.Log("FOO?");
-
-        //    //_ = DelayFrame3_Pre();
-        //    //await UniTask.Yield();
-
-        //}));
-
-        //cancelButton.onClick.AddListener(UniTask.UnityAction(async () =>
-        //{
-        //    _ = DelayFrame3_Post();
-        //    await UniTask.Yield();
-
-        //    //await UniTask.Yield(PlayerLoopTiming.LastPreUpdate);
-        //    //UnityEngine.Debug.Log("before update:" + Time.frameCount);
-        //    //await UniTask.NextFrame();
-        //    //await UniTask.Yield();
-        //    //UnityEngine.Debug.Log("before update nextframe:" + Time.frameCount);
-
-        //    //StartCoroutine(CoroutineRun());
-
-        //    //UnityEngine.Debug.Log("click:" + PlayerLoopInfo.CurrentLoopType);
-        //    //_ = Yieldding();
-
-        //    //var cts = new CancellationTokenSource();
-
-        //    //UnityEngine.Debug.Log("click:" + PlayerLoopInfo.CurrentLoopType + ":" + Time.frameCount);
-        //    //var la = SceneManager.LoadSceneAsync("Scenes/ExceptionExamples").WithCancellation(cts.Token);
-        //    ////cts.Cancel();
-        //    //await la;
-        //    //UnityEngine.Debug.Log("End LoadSceneAsync" + PlayerLoopInfo.CurrentLoopType + ":" + Time.frameCount);
-        //}));
-
-        //return;
-        //await UniTask.SwitchToMainThread();
-
-        //UniTaskAsyncEnumerable.EveryValueChanged(mcc, x => x.MyProperty)
-        //    .Do(_ => { }, () => Debug.Log("COMPLETED"))
-        //    .ForEachAsync(x =>
-        //    {
-        //        Debug.Log("VALUE_CHANGED:" + x);
-        //    })
-        //    .Forget();
-
-        //_ = Test1();
-        //Test2().Forget();
-        //StartCoroutine(Test3("https://bing.com/"));
-
-
-
-
-
-        //bool flip = false;
-        //var rect = cancelButton.GetComponent<RectTransform>();
-        //var cts = new CancellationTokenSource();
-        //var ct = cts.Token;
-        //okButton.onClick.AddListener(UniTask.UnityAction(async () =>
-        //{
-        //    await rect.DOMoveX(10f * (flip ? -1 : 1), 3).OnUpdate(() => { Debug.Log("UPDATE YEAH"); }).WithCancellation(ct);
-        //    flip = !flip;
-        //    // ok.
-        //}));
-        //cancelButton.onClick.AddListener(() =>
-        //{
-        //    cts.Cancel();
-        //});
-
-
-        // DG.Tweening.Core.TweenerCore<int>
-        //Debug.Log("GO MOVEX");
-        //await okButton.GetComponent<RectTransform>().DOMoveX(-10.2f, 3).WithCancellation(CancellationToken.None);
-        //Debug.Log("END MOVEX");
-
-
-        //Debug.Log("AGAIN MOVE");
-        //await okButton.GetComponent<RectTransform>().DOMoveY(10.2f, 3).WithCancellation(CancellationToken.None);
-        //Debug.Log("AGAIN END MOVE");
-
-        //Debug.Log(Test().GetType().FullName);
-
-
-
-        // check stacktrace
-        // await UniTaskAsyncEnumerable.EveryUpdate().Where((x, i) => i % 2 == 0).Select(x => x).DistinctUntilChanged().ForEachAsync(x =>
-        //{
-        // Debug.Log("test");
-        //});
-
-
-
-
-        //// DOTween.To(
-
-        //var cts = new CancellationTokenSource();
-
-        ////var tween = okButton.GetComponent<RectTransform>().DOLocalMoveX(100, 5.0f);
-
-        //cancelButton.OnClickAsAsyncEnumerable().ForEachAsync(_ =>
-        //{
-        //    cts.Cancel();
-        //}).Forget();
-
-
-        //// await tween.ToUniTask(TweenCancelBehaviour.KillAndCancelAwait, cts.Token);
-
-        ////tween.SetRecyclable(true);
-
-        //Debug.Log("END");
-
-        //// tween.Play();
-
-        //// DOTween.
-
-        //// DOVirtual.Float(0, 1, 1, x => { }).ToUniTask();
-
-
-        //await foreach (var _ in UniTaskAsyncEnumerable.EveryUpdate())
-        //{
-        //    Debug.Log("Update() " + Time.frameCount);
-        //}
-
-
-
-        //await okButton.OnClickAsAsyncEnumerable().Where((x, i) => i % 2 == 0).ForEachAsync(_ =>
-        //{
-        //});
-
-
-        //okButton.OnClickAsAsyncEnumerable().ForEachAsync(_ =>
-        //{
-
-
-        //foreach (var (type, size) in TaskPool.GetCacheSizeInfo())
-        //{
-        //    Debug.Log(type + ":" + size);
-        //}
-
-
-        //}).Forget();
-
-        //CloseAsync(this.GetCancellationTokenOnDestroy()).Forget();
-
-        //okButton.onClick.AddListener(UniTask.UnityAction(async () => await UniTask.Yield()));
-
-
-
-        //UpdateUniTask().Forget();
-
-        //StartCoroutine(Coroutine());
-
-        //await UniTask.Delay(TimeSpan.FromSeconds(1));
-
-
-        // _ = ReturnToMainThreadTest();
-
-        //GameObject.Destroy(this.gameObject);
+        TestAsync(cts.Token).Forget();
 
+        okButton.onClick.AddListener(UniTask.UnityAction(async () =>
+        {
+            cts.Cancel();
+            await UniTask.Yield();
+        }));
 
+        await UniTask.Yield();
     }
 
     private void Application_logMessageReceived2(string condition, string stackTrace, LogType type)
@@ -1051,6 +918,17 @@ public class SandboxMain : MonoBehaviour
     }
 }
 
+
+public class SyncContextInjecter
+{
+    [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
+    public static void Inject()
+    {
+        SynchronizationContext.SetSynchronizationContext(new UniTaskSynchronizationContext());
+    }
+}
+
+
 public class PlayerLoopInfo
 {
     // [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
@@ -1085,7 +963,7 @@ public class PlayerLoopInfo
 
     public static Type CurrentLoopType { get; private set; }
 
-    [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
+    // [RuntimeInitializeOnLoadMethod(RuntimeInitializeLoadType.SubsystemRegistration)]
     public static void Inject()
     {
         var system = PlayerLoop.GetCurrentPlayerLoop();

src/UniTask/Assets/TempAsm/FooMonoBehaviour.cs

@@ -14,14 +14,14 @@ public class FooMonoBehaviour : MonoBehaviour
 
     private async UniTask Download(UnityWebRequest req, string filePath)
     {
-        var foo = req.SendWebRequest();
+        _ = req.SendWebRequest();
 
 
-        
 
-        var aaa = await foo;
-        Debug.Log(aaa);
 
+        // var aaa = await foo;
+        // Debug.Log(aaa);
+        await UniTask.Yield();
         //File.WriteAllText(filePath, req.downloadHandler.text ?? string.Empty);
     }
 }

src/UniTask/Assets/Tests/AsyncTest.cs

@@ -55,6 +55,8 @@ namespace Cysharp.Threading.TasksTests
             }
         }
 
+#if !UNITY_WEBGL
+
         [UnityTest]
         public IEnumerator DelayAnd() => UniTask.ToCoroutine(async () =>
         {
@@ -76,6 +78,8 @@ namespace Cysharp.Threading.TasksTests
             }
         });
 
+#endif
+
         [UnityTest]
         public IEnumerator DelayIgnore() => UniTask.ToCoroutine(async () =>
         {
@@ -183,6 +187,8 @@ namespace Cysharp.Threading.TasksTests
             diff.Should().Be(11);
         });
 
+#if !UNITY_WEBGL
+
         [UnityTest]
         public IEnumerator SwitchTo() => UniTask.ToCoroutine(async () =>
         {
@@ -215,6 +221,8 @@ namespace Cysharp.Threading.TasksTests
             currentThreadId.Should().Be(switchedThreadId2);
         });
 
+#endif
+
         //[UnityTest]
         //public IEnumerator ObservableConversion() => UniTask.ToCoroutine(async () =>
         //{

src/UniTask/Assets/Tests/CoroutineToUniTaskTest.cs

@@ -0,0 +1,196 @@
+#if CSHARP_7_OR_LATER || (UNITY_2018_3_OR_NEWER && (NET_STANDARD_2_0 || NET_4_6))
+#pragma warning disable CS1591 // Missing XML comment for publicly visible type or member
+
+using UnityEngine;
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using UnityEngine.UI;
+using UnityEngine.Scripting;
+using Cysharp.Threading.Tasks;
+using Unity.Collections;
+using System.Threading;
+using NUnit.Framework;
+using UnityEngine.TestTools;
+using FluentAssertions;
+
+namespace Cysharp.Threading.TasksTests
+{
+    public class CoroutineToUniTaskTest
+    {
+        [UnityTest]
+        public IEnumerator EarlyUpdate() => UniTask.ToCoroutine(async () =>
+        {
+            await UniTask.Yield(PlayerLoopTiming.EarlyUpdate);
+
+            var l = new List<(int, int)>();
+            var currentFrame = Time.frameCount;
+            var t = Worker(l).ToUniTask();
+
+            l.Count.Should().Be(1);
+            l[0].Should().Be((0, currentFrame));
+
+            await t;
+
+            l[1].Should().Be((1, Time.frameCount));
+            l[1].Item2.Should().NotBe(currentFrame);
+        });
+
+        [UnityTest]
+        public IEnumerator LateUpdate() => UniTask.ToCoroutine(async () =>
+        {
+            await UniTask.Yield(PlayerLoopTiming.PostLateUpdate);
+
+            var l = new List<(int, int)>();
+            var currentFrame = Time.frameCount;
+            var t = Worker(l).ToUniTask();
+
+            l.Count.Should().Be(1);
+            l[0].Should().Be((0, currentFrame));
+
+            await t;
+
+            l[1].Should().Be((1, Time.frameCount));
+            l[1].Item2.Should().NotBe(currentFrame);
+        });
+
+        //[UnityTest]
+        //public IEnumerator TestCoroutine()
+        //{
+        //    yield return UniTask.Yield(PlayerLoopTiming.EarlyUpdate).ToUniTask().ToCoroutine();
+
+        //    var nanika = (UnityEngine.MonoBehaviour)GameObject.FindObjectOfType(typeof(UnityEngine.MonoBehaviour));
+
+        //    var l = new List<(int, int)>();
+        //    var currentFrame = Time.frameCount;
+        //    var t = nanika.StartCoroutine(Worker(l));
+
+        //    l.Count.Should().Be(1);
+        //    l[0].Should().Be((0, currentFrame));
+
+        //    yield return t;
+
+        //    l[1].Should().Be((1, Time.frameCount));
+        //    l[1].Item2.Should().NotBe(currentFrame);
+        //}
+
+        //[UnityTest]
+        //public IEnumerator TestCoroutine2()
+        //{
+        //    yield return UniTask.Yield(PlayerLoopTiming.PostLateUpdate).ToUniTask().ToCoroutine();
+
+        //    var nanika = (UnityEngine.MonoBehaviour)GameObject.FindObjectOfType(typeof(UnityEngine.MonoBehaviour));
+
+        //    var l = new List<(int, int)>();
+        //    var currentFrame = Time.frameCount;
+        //    var t = nanika.StartCoroutine(Worker(l));
+
+        //    l.Count.Should().Be(1);
+        //    l[0].Should().Be((0, currentFrame));
+
+        //    yield return t;
+
+        //    l[1].Should().Be((1, Time.frameCount));
+        //    l[1].Item2.Should().NotBe(currentFrame);
+        //}
+
+        [UnityTest]
+        public IEnumerator ImmediateRunTest() => UniTask.ToCoroutine(async () =>
+        {
+            var l = new List<int>();
+            var x1 = Immediate(l);
+            var x2 = Immediate(l);
+            var x3 = DelayOne(l);
+
+            var t1 = x1.ToUniTask();
+            CollectionAssert.AreEqual(l, new[] { 1, 2, 3 });
+            await t1;
+
+            var t2 = x2.ToUniTask();
+            CollectionAssert.AreEqual(l, new[] { 1, 2, 3, 1, 2, 3 });
+
+            var t3 = x3.ToUniTask();
+            CollectionAssert.AreEqual(l, new[] { 1, 2, 3, 1, 2, 3, 10 });
+
+            await UniTask.WhenAll(t2, t3);
+            CollectionAssert.AreEqual(l, new[] { 1, 2, 3, 1, 2, 3, 10, 20, 30 });
+
+        });
+
+        IEnumerator Immediate(List<int> l)
+        {
+            l.Add(1);
+            l.Add(2);
+            l.Add(3);
+            yield break;
+        }
+
+        IEnumerator DelayOne(List<int> l)
+        {
+            l.Add(10);
+            yield return null;
+            l.Add(20);
+            l.Add(30);
+        }
+
+#if !UNITY_WEBGL
+
+        [UnityTest]
+        public IEnumerator WaitForSecondsTest() => UniTask.ToCoroutine(async () =>
+        {
+            await UniTask.Yield(PlayerLoopTiming.PostLateUpdate);
+
+            Time.timeScale = 0.5f;
+            try
+            {
+                var now = DateTimeOffset.UtcNow;
+
+                await WaitFor();
+
+                var elapsed = DateTimeOffset.UtcNow - now;
+
+                (5.8f <= elapsed.TotalSeconds && elapsed.TotalSeconds <= 6.2f).Should().BeTrue();
+            }
+            finally
+            {
+                Time.timeScale = 1.0f;
+            }
+        });
+
+        IEnumerator WaitFor()
+        {
+            yield return new WaitForSeconds(3.0f);
+        }
+
+#endif
+
+        IEnumerator Worker(List<(int, int)> l)
+        {
+            l.Add((0, Time.frameCount));
+            yield return null;
+            l.Add((1, Time.frameCount));
+        }
+
+        public async UniTask Foo()
+        {
+            var tasks = new List<UniTask>();
+            var t = Bar<int>();
+            tasks.Add(t);
+
+            t = Bar<int>();
+            tasks.Add(t);
+
+            await UniTask.WhenAll(tasks);
+        }
+
+        public async UniTask<T> Bar<T>()
+        {
+            await UniTask.Yield();
+            return default(T);
+        }
+    }
+}
+
+#endif

src/UniTask/Assets/Tests/CoroutineToUniTaskTest.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 43ffb719370515746932af3732ce073e
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

src/UniTask/Assets/Tests/DelayTest.cs

@@ -175,6 +175,7 @@ namespace Cysharp.Threading.TasksTests
             }
         });
 
+#if !UNITY_WEBGL
 
         [UnityTest]
         public IEnumerator DelayInThreadPool() => UniTask.ToCoroutine(async () =>
@@ -185,6 +186,8 @@ namespace Cysharp.Threading.TasksTests
             });
         });
 
+#endif
+
         [UnityTest]
         public IEnumerator DelayRealtime() => UniTask.ToCoroutine(async () =>
         {
@@ -200,5 +203,16 @@ namespace Cysharp.Threading.TasksTests
             okay1.Should().Be(true);
             okay2.Should().Be(true);
         });
+
+
+        [UnityTest]
+        public IEnumerator LoopTest() => UniTask.ToCoroutine(async () =>
+        {
+            for (int i = 0; i < 20; ++i)
+            {
+                UniTask.DelayFrame(100).Forget();
+                await UniTask.DelayFrame(1);
+            }
+        });
     }
 }

src/UniTask/Assets/Tests/RunTest.cs

@@ -37,6 +37,7 @@ namespace Cysharp.Threading.TasksTests
     {
 #if CSHARP_7_OR_LATER || (UNITY_2018_3_OR_NEWER && (NET_STANDARD_2_0 || NET_4_6))
 #if !UNITY_WSA
+#if !UNITY_WEBGL
 
         //[UnityTest]
         //public IEnumerator RunThread() => UniTask.ToCoroutine(async () =>
@@ -88,7 +89,7 @@ namespace Cysharp.Threading.TasksTests
             }
         });
 
-
+#endif
 #endif
 #endif
     }

src/UniTask/ProjectSettings/PackageManagerSettings.asset

@@ -0,0 +1,43 @@
+%YAML 1.1
+%TAG !u! tag:unity3d.com,2011:
+--- !u!114 &1
+MonoBehaviour:
+  m_ObjectHideFlags: 61
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 0}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 13964, guid: 0000000000000000e000000000000000, type: 0}
+  m_Name: 
+  m_EditorClassIdentifier: 
+  m_EnablePreviewPackages: 0
+  m_EnablePackageDependencies: 0
+  m_AdvancedSettingsExpanded: 1
+  m_ScopedRegistriesSettingsExpanded: 1
+  oneTimeWarningShown: 0
+  m_Registries:
+  - m_Id: main
+    m_Name: 
+    m_Url: https://packages.unity.com
+    m_Scopes: []
+    m_IsDefault: 1
+    m_Capabilities: 7
+  m_UserSelectedRegistryName: 
+  m_UserAddingNewScopedRegistry: 0
+  m_RegistryInfoDraft:
+    m_ErrorMessage: 
+    m_Original:
+      m_Id: 
+      m_Name: 
+      m_Url: 
+      m_Scopes: []
+      m_IsDefault: 0
+      m_Capabilities: 0
+    m_Modified: 0
+    m_Name: 
+    m_Url: 
+    m_Scopes:
+    - 
+    m_SelectedScopeIndex: 0

src/UniTask/ProjectSettings/ProjectSettings.asset

@@ -111,6 +111,8 @@ PlayerSettings:
   switchNVNShaderPoolsGranularity: 33554432
   switchNVNDefaultPoolsGranularity: 16777216
   switchNVNOtherPoolsGranularity: 16777216
+  stadiaPresentMode: 0
+  stadiaTargetFramerate: 0
   vulkanNumSwapchainBuffers: 3
   vulkanEnableSetSRGBWrite: 0
   m_SupportedAspectRatios:
@@ -191,22 +193,6 @@ PlayerSettings:
   uIStatusBarHidden: 1
   uIExitOnSuspend: 0
   uIStatusBarStyle: 0
-  iPhoneSplashScreen: {fileID: 0}
-  iPhoneHighResSplashScreen: {fileID: 0}
-  iPhoneTallHighResSplashScreen: {fileID: 0}
-  iPhone47inSplashScreen: {fileID: 0}
-  iPhone55inPortraitSplashScreen: {fileID: 0}
-  iPhone55inLandscapeSplashScreen: {fileID: 0}
-  iPhone58inPortraitSplashScreen: {fileID: 0}
-  iPhone58inLandscapeSplashScreen: {fileID: 0}
-  iPadPortraitSplashScreen: {fileID: 0}
-  iPadHighResPortraitSplashScreen: {fileID: 0}
-  iPadLandscapeSplashScreen: {fileID: 0}
-  iPadHighResLandscapeSplashScreen: {fileID: 0}
-  iPhone65inPortraitSplashScreen: {fileID: 0}
-  iPhone65inLandscapeSplashScreen: {fileID: 0}
-  iPhone61inPortraitSplashScreen: {fileID: 0}
-  iPhone61inLandscapeSplashScreen: {fileID: 0}
   appleTVSplashScreen: {fileID: 0}
   appleTVSplashScreen2x: {fileID: 0}
   tvOSSmallIconLayers: []
@@ -557,7 +543,7 @@ PlayerSettings:
   platformArchitecture: {}
   scriptingBackend:
     Android: 1
-    Standalone: 0
+    Standalone: 1
   il2cppCompilerConfiguration: {}
   managedStrippingLevel: {}
   incrementalIl2cppBuild: {}
@@ -566,7 +552,8 @@ PlayerSettings:
   scriptingRuntimeVersion: 1
   gcIncremental: 0
   gcWBarrierValidation: 0
-  apiCompatibilityLevelPerPlatform: {}
+  apiCompatibilityLevelPerPlatform:
+    Standalone: 6
   m_RenderingPath: 1
   m_MobileRenderingPath: 1
   metroPackageName: Template_2D
@@ -621,6 +608,7 @@ PlayerSettings:
   XboxOnePersistentLocalStorageSize: 0
   XboxOneXTitleMemory: 8
   XboxOneOverrideIdentityName: 
+  XboxOneOverrideIdentityPublisher: 
   vrEditorSettings:
     daydream:
       daydreamIconForeground: {fileID: 0}

src/UniTask/ProjectSettings/ProjectVersion.txt

@@ -1,2 +1,2 @@
-m_EditorVersion: 2019.3.9f1
-m_EditorVersionWithRevision: 2019.3.9f1 (e6e740a1c473)
+m_EditorVersion: 2020.2.0f1
+m_EditorVersionWithRevision: 2020.2.0f1 (3721df5a8b28)

src/UniTask/ProjectSettings/VersionControlSettings.asset

@@ -0,0 +1,8 @@
+%YAML 1.1
+%TAG !u! tag:unity3d.com,2011:
+--- !u!890905787 &1
+VersionControlSettings:
+  m_ObjectHideFlags: 0
+  m_Mode: Visible Meta Files
+  m_CollabEditorSettings:
+    inProgressEnabled: 1

src/UniTask/UserSettings/EditorUserSettings.asset

@@ -0,0 +1,24 @@
+%YAML 1.1
+%TAG !u! tag:unity3d.com,2011:
+--- !u!162 &1
+EditorUserSettings:
+  m_ObjectHideFlags: 0
+  serializedVersion: 4
+  m_ConfigSettings:
+    RecentlyUsedScenePath-0:
+      value: 22424703114646680e0b0227036c6c1118131a25340527392367083debf42d
+      flags: 0
+    vcSharedLogLevel:
+      value: 0d5e400f0650
+      flags: 0
+  m_VCAutomaticAdd: 1
+  m_VCDebugCom: 0
+  m_VCDebugCmd: 0
+  m_VCDebugOut: 0
+  m_SemanticMergeMode: 2
+  m_VCShowFailedCheckout: 1
+  m_VCOverwriteFailedCheckoutAssets: 1
+  m_VCProjectOverlayIcons: 1
+  m_VCHierarchyOverlayIcons: 1
+  m_VCOtherOverlayIcons: 1
+  m_VCAllowAsyncUpdate: 0